A
8、(南通市2008屆基礎(chǔ)調(diào)研測(cè))2006年7月1日,世界上海拔最高、線路最長(zhǎng)的青藏鐵路全線通車,青藏鐵路安裝的一種電磁裝置可以向控制中心傳輸信號(hào),以確定火車的位置和運(yùn)動(dòng)狀態(tài),其原理是將能產(chǎn)生勻強(qiáng)磁場(chǎng)的磁鐵安裝在火車首節(jié)車廂下面,如圖甲所示(俯視圖),當(dāng)它經(jīng)過(guò)安放在兩鐵軌間的線圈時(shí),線圈便產(chǎn)生一個(gè)電信號(hào)傳輸給控制中心.線圈邊長(zhǎng)分別為l1和l2,匝數(shù)為n,線圈和傳輸線的電阻忽略不計(jì).若火車通過(guò)線圈時(shí),控制中心接收到線圈兩端的電壓信號(hào)u與時(shí)間t的關(guān)系如圖乙所示(ab、cd均為直線),t1、t2、t3、t4是運(yùn)動(dòng)過(guò)程的四個(gè)時(shí)刻,則火車 ACD
A.在t1~t2時(shí)間內(nèi)做勻加速直線運(yùn)動(dòng)
B.在t3~t4時(shí)間內(nèi)做勻減速直線運(yùn)動(dòng)
C.在t1~t2時(shí)間內(nèi)加速度大小為
D.在t3~ t4時(shí)間內(nèi)平均速度的大小為
9、(南京市2008屆4月高三調(diào)研考試)如圖所示的電路中,電源電動(dòng)勢(shì)為E,內(nèi)阻r不能忽略.R1和R2是兩個(gè)定值電阻,L是一個(gè)自感系數(shù)較大的線圈.開關(guān)S原來(lái)是斷開的.從開關(guān)S閉合到電路中電流達(dá)到穩(wěn)定的時(shí)間內(nèi),通過(guò)R1的電流I1和通過(guò)R2的電流I2的變化情況是AC
A.I1開始較大而后逐漸變小
B.I1開始很小而后逐漸變大
C.I2開始很小而后逐漸變大
D.I2開始較大而后逐漸變小
10、(如皋市2008屆抽樣檢測(cè))兩金屬棒和三根電阻絲如圖連接,虛線框內(nèi)存在均勻變化的勻強(qiáng)磁場(chǎng),三根電阻絲的電阻大小之比R1:R2:R3=1:2:3,金屬棒電阻不計(jì)。當(dāng)S1、S2閉合,S3 斷開時(shí),閉合的回路中感應(yīng)電流為I,當(dāng)S2、S3閉合,S1
斷開時(shí),閉合的回路中感應(yīng)電流為5I,當(dāng)S1、S3閉合,S2 斷開時(shí),閉合的回路中感應(yīng)電流是【 】D
A.0 B.3I C.6I
D.7I
11、(南通通州市2008屆第二次統(tǒng)一測(cè)試)如圖所示,MN和PQ為兩根足夠長(zhǎng)的水平光滑金屬導(dǎo)軌,導(dǎo)軌電阻不計(jì),變壓器為理想變壓器,現(xiàn)在水平導(dǎo)軌部分加一豎直向上的勻強(qiáng)磁場(chǎng),金屬棒ab與導(dǎo)軌電接觸良好,則以下說(shuō)法正確的是 ( )CD
A.若ab棒勻速運(yùn)動(dòng),則IR≠0,IC≠0
B.若ab棒勻速運(yùn)動(dòng),則IR≠0,IC=0
C.若ab棒在某一中心位置兩側(cè)做簡(jiǎn)諧運(yùn)動(dòng),則IR≠0,IC≠0
D.若ab棒做勻加速運(yùn)動(dòng),IR≠0,IC=0
12、(南通通州市2008屆第二次統(tǒng)一測(cè)試)物理學(xué)的基本原理在生產(chǎn)生活中有著廣泛應(yīng)用.下面列舉的四種器件中,利用電磁感應(yīng)現(xiàn)象工作的是(
)B
A.回旋加速器
B.日光燈 C.質(zhì)譜儀 D.示波器
13、(2008年蘇、錫、常、鎮(zhèn)四市調(diào)查二)如圖所示,在水平絕緣平面上固定足夠長(zhǎng)的平行光滑金屬導(dǎo)軌(電阻不計(jì)),導(dǎo)軌左端連接一個(gè)阻值為R的電阻,質(zhì)量為m的金屬棒(電阻不計(jì))放在導(dǎo)軌上,金屬棒與導(dǎo)軌垂直且與導(dǎo)軌接觸良好.整個(gè)裝置放在勻強(qiáng)磁場(chǎng)中,磁場(chǎng)方向與導(dǎo)軌平面垂直,在用水平恒力F把金屬棒從靜止開始向右拉動(dòng)的過(guò)程中,下列說(shuō)法正確的是CD
A.恒力F與安培力做的功之和等于電路中產(chǎn)生的電能與金屬棒獲得的動(dòng)能和
B.恒力F做的功一定等于克服安培力做的功與電路中產(chǎn)生的電能之和
C.恒力F做的功一定等于克服安培力做的功與金屬棒獲得的動(dòng)能之和
D.恒力F做的功一定等于電路中產(chǎn)生的電能與金屬棒獲得的動(dòng)能之和
14、(2008年蘇、錫、常、鎮(zhèn)四市調(diào)查二)如圖所示,MN和PQ為處于同一水平面內(nèi)的兩根平行的光滑金屬導(dǎo)軌,導(dǎo)軌的電阻不計(jì).垂直導(dǎo)軌放置一根電阻不變的金屬棒ab,金屬棒與導(dǎo)軌接觸良好.N、Q端接理想變壓器的原線圈,理想變壓器的輸出端有三組副線圈,分別接電阻元件R、電感元件L(電阻不為零)和電容元件C.在水平金屬導(dǎo)軌之間加豎直向下的磁感應(yīng)強(qiáng)度隨時(shí)間均勻增加的勻強(qiáng)磁場(chǎng),若用IR、IL、Ic分別表示通過(guò)R、L和C的電流,則下列判斷正確的是AC
A.若ab棒靜止,則IR=0、IL=0、IC=0
B.在ab棒向左勻速運(yùn)動(dòng)過(guò)程中,
IR≠0、IL≠0、IC≠0
C.在ab棒向左勻速運(yùn)動(dòng)過(guò)程中,
IR≠0、IL≠0、IC=0
D.在ab棒向左勻加速運(yùn)動(dòng)過(guò)程中,則IR≠0、IL≠0、IC=0
15、(溫州市十校聯(lián)合體2008屆期中聯(lián)考)如圖所示,等腰直角三角形OPQ區(qū)域內(nèi)存在勻強(qiáng)磁場(chǎng),另有一等腰直角三角形導(dǎo)線框ABC以恒定的速度沿垂直于磁場(chǎng)方向穿過(guò)磁場(chǎng),穿越過(guò)程中速度始終與AB邊垂直且保持AC平行于OQ。關(guān)于線框中的感應(yīng)電流,以下說(shuō)法中正確的是BC
A.開始進(jìn)入磁場(chǎng)時(shí)感應(yīng)電流沿順時(shí)針?lè)较?/p>
B.開始進(jìn)入磁場(chǎng)時(shí)感應(yīng)電流最大
C.開始穿出磁場(chǎng)時(shí)感應(yīng)電流沿順時(shí)針?lè)较?/p>
D.開始穿出磁場(chǎng)時(shí)感應(yīng)電流最大
16、(溫州市十校聯(lián)合體2008屆期中聯(lián)考)如圖所示,水平的平行虛線間距為d=50cm,其間有B=1.0T的勻強(qiáng)磁場(chǎng)。一個(gè)正方形線圈邊長(zhǎng)為l=10cm,線圈質(zhì)量m=100g,電阻為R=0.20Ω。開始時(shí),線圈的下邊緣到磁場(chǎng)上邊緣的距離為h=80cm。將線圈由靜止釋放,其下邊緣剛進(jìn)入磁場(chǎng)和剛穿出磁場(chǎng)時(shí)的速度相等。取g=10m/s2,
求:(1) 線圈下邊緣剛進(jìn)入磁場(chǎng)時(shí),線圈產(chǎn)生電流的大小和方向;
(2)線圈進(jìn)入磁場(chǎng)過(guò)程中產(chǎn)生的電熱Q。
(1)線圈由1位置到2位置:自由落體運(yùn)動(dòng),
設(shè)在2位置時(shí)速度為v0
(1分)
E=BLV (1分)
(1分)
由以上三式可得:I=2A (1分)
方向:逆時(shí)針 (1分)
(2)線圈進(jìn)入磁場(chǎng)過(guò)程中產(chǎn)生的電熱Q就是線圈從圖中2位置到3位置產(chǎn)生的電熱,
而2、3位置動(dòng)能相同,
由能量守恒Q=mgd=0.50J (4分)
17、(江蘇省九名校2007年第二次聯(lián)考)(★★★★)19.(16分)如圖所示,水平放置的光滑平行導(dǎo)軌的寬L=0.2m,軌道平面內(nèi)有豎直向上的勻強(qiáng)磁場(chǎng),
磁感應(yīng)強(qiáng)度B=0.5T,ab和cd棒均靜止在導(dǎo)軌上,質(zhì)量相等為m=0.1kg,電阻相等為R=0.5Ω.現(xiàn)用F=0.2N向右的水平恒力使ab棒由靜止開始運(yùn)動(dòng),經(jīng)t=5s,ab棒的加速度a=1.37m/s2,則:
⑴此時(shí)ab和cd兩棒的速度vab、 vcd各為多大?
⑵穩(wěn)定時(shí)兩棒的速度差是多少?
解:⑴ab棒在外力F的作用下向右運(yùn)動(dòng),從而產(chǎn)生感應(yīng)電動(dòng)勢(shì),使得ab棒受到水平向左的安培力,cd棒受到水平向右的安培力,兩棒同時(shí)向右運(yùn)動(dòng),均產(chǎn)生感應(yīng)電動(dòng)勢(shì),其回路的等效電動(dòng)勢(shì)
E等 = Eab - Ecd = BLvab
- BLvcd = BL(vab-vcd)
= BL△v (2分)
根據(jù)牛頓第二定律有:F - F安= ma (2分)
又此時(shí)的安培力F安= BIL = (2分)
因?yàn)槭欠莿蜃兯龠\(yùn)動(dòng),故用動(dòng)量定理有:
(F - F安)t = mvab-0 (1分)
F安t = mvcd-0 (1分)
得此時(shí)ab、cd兩棒的速度分別為:vab =8.15m/s vcd=1.85m/s .(2分)
⑵該題中的“穩(wěn)定狀態(tài)”又與前面兩種情況不同,系統(tǒng)的合外力不為零且不變, “平衡狀態(tài)”應(yīng)該是它們的加速度相同,此時(shí)兩棒速度不相同但保持“相對(duì)”穩(wěn)定,所以整體以穩(wěn)定的速度差、相同的加速度一起向右做加速運(yùn)動(dòng).
用整體法有:F = 2ma′ (2分)
對(duì)cd棒用隔離法有: = ma′(2分)
從而可得穩(wěn)定時(shí)速度差△v=vab-vcd=10m/s .
(2分)
18、(江蘇省九名校2007年第二次聯(lián)考)(★★★)19.(16分)如圖所示,足夠長(zhǎng)的金屬導(dǎo)軌MN和PQ與R相連,平行地放在水平桌面上,質(zhì)量為m的金屬桿可以無(wú)摩擦地沿導(dǎo)軌運(yùn)動(dòng).導(dǎo)軌與ab桿的電阻不計(jì),導(dǎo)軌寬度為L,磁感應(yīng)強(qiáng)度為B的勻強(qiáng)磁場(chǎng)垂直穿過(guò)整個(gè)導(dǎo)軌平面.現(xiàn)給金屬桿ab一個(gè)瞬時(shí)沖量I0,使ab桿向右滑行.
(1)求回路的最大電流.
(2)當(dāng)滑行過(guò)程中電阻上產(chǎn)生的熱量為Q時(shí),桿ab的加速度多大?
(3)桿ab從開始運(yùn)動(dòng)到停下共滑行了多少距離?
解:(1)由動(dòng)量定理I0 = mv0
? 0 得v0 = (2分)
金屬桿在導(dǎo)軌上做減速運(yùn)動(dòng),剛開始時(shí)速度最大,感應(yīng)電動(dòng)勢(shì)也最大,有:
Em = BLv (1分)
所以回路的最大電流Im = = .(1分)
(2) 設(shè)此時(shí)桿的速度為v,由能的轉(zhuǎn)化和守恒有:
Q = mv2 - mv20 (2分)
解得:v = (1分)
由牛頓第二定律得:BIL = ma (1分)
由閉合電路歐姆定律得:I = (1分)
解得:a = .(1分)
(3)對(duì)全過(guò)程應(yīng)用動(dòng)量定理有:
―BIL?Δt = 0 ? I0 (2分)
而I = = (2分)
解得:x = .(2分)
19、(南京市2008年高三總復(fù)習(xí)試卷)(18分)如圖所示,一個(gè)質(zhì)量m=0.1 kg、阻值R=0.5Ω的正方形金屬框,放在表面絕緣且光滑的斜面頂端(框上邊與從AA‘重合),自靜止開始沿斜面下滑,下滑過(guò)程中穿過(guò)一段邊界與斜面底邊BB‘平行、寬度為d的勻強(qiáng)磁場(chǎng)后滑至斜面底端(框下邊與BB‘重合)。設(shè)金屬在下滑過(guò)程中的速度為v時(shí)所對(duì)應(yīng)的位移為s,那么v2―s圖象如圖所示,已知?jiǎng)驈?qiáng)磁場(chǎng)方向垂直斜面向上。試問(wèn):
(1)根據(jù)v2―s圖象所提供的信息,計(jì)算出斜面傾角和勻強(qiáng)磁場(chǎng)的寬度d。
(2)勻強(qiáng)磁場(chǎng)的磁感應(yīng)強(qiáng)度為多大?金屬框從斜面頂端滑至底端所需的時(shí)間為多少?
解:(1)由圖象可知,金屬框從開始運(yùn)動(dòng)到位移過(guò)程中,做勻加速直線運(yùn)動(dòng)。根據(jù)運(yùn)動(dòng)學(xué)公式①,動(dòng)力學(xué)公式②,代入數(shù)據(jù)解得,。
由圖象可知,金屬框從1.6 m運(yùn)動(dòng)到2.6 m過(guò)程中做勻速直線運(yùn)動(dòng),位移,加速度,速度;從2.6m運(yùn)動(dòng)到3.4m過(guò)程中做勻加速直線運(yùn)動(dòng),,初速度,加速度。由此可判斷,金屬框從進(jìn)入磁場(chǎng)開始到完全離開磁場(chǎng)一直在做勻速直線運(yùn)動(dòng),故s2=2d③,d=0.5 m。
(2)由勻速直線運(yùn)動(dòng),當(dāng)金屬框運(yùn)動(dòng)位移為s=2.6m時(shí)開始做勻速直線運(yùn)動(dòng),故受力平衡。即④,解得。
金屬框從斜面頂端滑至底端所需的時(shí)間 ⑤
評(píng)分標(biāo)準(zhǔn):(1)(10分)寫出①②兩式各得2分,得到得2分,寫出③式得3分,得到d=0.5m得1分,(2)(8分)寫出④⑤兩式各得3分,分別解出B與t的值再各得1分,答不出酌情扣分。
20、(南通通州市2008屆第二次統(tǒng)一測(cè)試)(13分)兩根相距為L(zhǎng)的足夠長(zhǎng)的金屬直角導(dǎo)軌如圖所示放置,它們各有一邊在同一水平面內(nèi),另一邊垂直于水平面.質(zhì)量均為m的金屬細(xì)桿ab、cd與導(dǎo)軌垂直接觸形成閉合回路,桿與水平和豎直導(dǎo)軌之間有相同的動(dòng)摩擦因數(shù)μ,導(dǎo)軌電阻不計(jì),回路總電阻為2R,整個(gè)裝置處于磁感應(yīng)強(qiáng)度大小為B、方向豎直向上的勻強(qiáng)磁場(chǎng)中.當(dāng)ab桿在平行于水平導(dǎo)軌的拉力作用下沿導(dǎo)軌向右勻速運(yùn)動(dòng)時(shí),cd桿也正好以某一速度向下做勻速運(yùn)動(dòng),設(shè)運(yùn)動(dòng)過(guò)程中金屬細(xì)桿ab、cd與導(dǎo)軌接觸良好,重力加速度為g,求:
(1)ab桿勻速運(yùn)動(dòng)的速度v1;
(2)ab桿所受拉力F;
(3)ab桿以v1勻速運(yùn)動(dòng)時(shí),cd桿以v2(v2已知)勻速運(yùn)動(dòng),則在cd桿向下運(yùn)動(dòng)過(guò)程中,整個(gè)回路中產(chǎn)生的焦耳熱.
解:(1)ab桿向右運(yùn)動(dòng)時(shí),ab桿中產(chǎn)生的感應(yīng)電動(dòng)勢(shì)方向?yàn)閍→b,
大小為
(1分)
cd桿中的感應(yīng)電流方向?yàn)閐→c,cd桿受到的安培力方向水平向右
安培力大小為 ① (2分)
cd桿向下勻速運(yùn)動(dòng),有
②
(2分)
解①、②兩式,ab桿勻速運(yùn)動(dòng)的速度為= ③
(1分)
(2)ab桿所受拉力F+μmg④ (3分)
(3)設(shè)cd桿以速度向下運(yùn)動(dòng)過(guò)程中,ab桿勻速運(yùn)動(dòng)了距離,
, ∴
(2分)
整個(gè)回路中產(chǎn)生的焦耳熱等于克服安培力所做的功
==
(2分)
21、(江蘇省2008年百校樣本分析考試)(12分)如圖光滑斜面的傾角θ=30°,在斜面上放置一矩形線框abcd,ab邊的邊長(zhǎng)l1=1m,bc邊的長(zhǎng)l2=0.6m,線框的質(zhì)量m=1kg,電阻R=0.1Ω,線框用細(xì)線通過(guò)定滑輪與重物相連,重物質(zhì)量M=2kg,斜面上ef線與gh線(ef∥gh ∥pq)間有垂直斜面向上的勻強(qiáng)磁場(chǎng),磁感應(yīng)強(qiáng)度為B1=0.5T,
gh線與pq線間有垂直斜面向下的勻強(qiáng)磁場(chǎng),磁感應(yīng)強(qiáng)度B2=0.5T.如果線框從靜止開始運(yùn)動(dòng),當(dāng)ab邊進(jìn)入磁場(chǎng)時(shí)恰好做勻速直線運(yùn)動(dòng),ab邊由靜止開始運(yùn)動(dòng)到gh線所用的時(shí)間為2.3s
,求:
(1)求ef線和gh線間的距離;
(2)ab邊由靜止開始運(yùn)動(dòng)到gh線這段時(shí)間內(nèi)產(chǎn)生的焦耳熱;
(3) ab邊剛進(jìn)入gh線瞬間線框的加速度.
⑴線框abcd受力平衡
(1分)
ab邊進(jìn)入磁場(chǎng)切割磁感線,產(chǎn)生的電動(dòng)勢(shì)
形成的感應(yīng)電流 受到的安培力 (1分)
聯(lián)立得:
解得
(2分)
線框abcd進(jìn)磁場(chǎng)B1前時(shí),做勻加速直線運(yùn)動(dòng);進(jìn)磁場(chǎng)的過(guò)程中,做勻速直線運(yùn)動(dòng);進(jìn)入磁場(chǎng)后到運(yùn)動(dòng)到gh線,仍做勻加速直線運(yùn)動(dòng).
進(jìn)磁場(chǎng)前 對(duì)M: 對(duì)m:
聯(lián)立解得:
(1分)
該階段運(yùn)動(dòng)時(shí)間為
進(jìn)磁場(chǎng)B1過(guò)程中 勻速運(yùn)動(dòng)時(shí)間
進(jìn)磁場(chǎng)后 線框受力情況同進(jìn)磁場(chǎng)前,所以該階段的加速度仍為
(1分)
ef線和gh線間的距離
(1分)
此時(shí)線框的速度為
⑵ (3分)
(3) ab邊剛進(jìn)入gh線瞬間線框的加速度沿斜面向下
(2分)
解得:
22、(淮安、連云港、宿遷、徐州四市2008第三次調(diào)研)(10分)如圖所示,足夠長(zhǎng)的光滑平行金屬導(dǎo)軌cd和ef,水平放置且相距L,在其左端各固定一個(gè)半徑為r的四分之三金屬光滑圓環(huán),兩圓環(huán)面平行且豎直。在水平導(dǎo)軌和圓環(huán)上各有一根與導(dǎo)軌垂直的金屬桿,兩金屬桿與水平導(dǎo)軌、金屬圓環(huán)形成閉合回路,兩金屬桿質(zhì)量均為m,電阻均為R,其余電阻不計(jì)。整個(gè)裝置放在磁感應(yīng)強(qiáng)度大小為B、方向豎直向上的勻強(qiáng)磁場(chǎng)中。當(dāng)用水平向右的恒力F=mg拉細(xì)桿a,達(dá)到勻速運(yùn)動(dòng)時(shí),桿b恰好靜止在圓環(huán)上某處,試求:
(1)桿a做勻速運(yùn)動(dòng)時(shí),回路中的感應(yīng)電流;
(2)桿a做勻速運(yùn)動(dòng)時(shí)的速度;
(3)桿b靜止的位置距圓環(huán)最低點(diǎn)的高度。
⑴勻速時(shí),拉力與安培力平衡,F(xiàn)=BIL
得:(2分)
⑵金屬棒a切割磁感線,產(chǎn)生的電動(dòng)勢(shì)E=BLv
回路電流
聯(lián)立得:(4分)
⑶平衡時(shí),棒和圓心的連線與豎直方向的夾角為θ,
得:θ=60°
(4分)
23、(淮安、連云港、宿遷、徐州四市2008第2次調(diào)研)如圖甲所示,一邊長(zhǎng)L=2.5m、質(zhì)量m=0.5kg的正方形金屬線框,放在光滑絕緣的水平面上,整個(gè)裝置放在方向豎直向上、磁感應(yīng)強(qiáng)度B=0.8T的勻強(qiáng)磁場(chǎng)中,它的一邊與磁場(chǎng)的邊界MN重合。在水平力F作用下由靜止開始向左運(yùn)動(dòng),經(jīng)過(guò)5s線框被拉出磁場(chǎng)。測(cè)得金屬線框中的電流隨時(shí)間變化的圖像如乙圖所示,在金屬線框被拉出的過(guò)程中。
⑴求通過(guò)線框?qū)Ь截面的電量及線框的電阻;
⑵寫出水平力F隨時(shí)間變化的表達(dá)式;
⑶已知在這5s內(nèi)力F做功1.92J,那么在此過(guò)程中,線框產(chǎn)生的焦耳熱是多少?
⑴根據(jù)q =t,由I-t圖象得:q =1.25C (2分)
又根據(jù)==
(2分)
得R = 4Ω (1分)
⑵由電流圖像可知,感應(yīng)電流隨時(shí)間變化的規(guī)律:I=0.1t (1分)
由感應(yīng)電流,可得金屬框的速度隨時(shí)間也是線性變化的,(1分)
線框做勻加速直線運(yùn)動(dòng),加速度a = 0.2m/s2
(1分)
線框在外力F和安培力FA作用下做勻加速直線運(yùn)動(dòng),(1分)
得力F=(0.2 t+0.1)N
(1分)
⑶ t=5s時(shí),線框從磁場(chǎng)中拉出時(shí)的速度v5 = at =1m/s
(1分)
線框中產(chǎn)生的焦耳熱J (3分)
24、(南京市2008屆4月高三調(diào)研考試)(本題12分)如圖,豎直放置的光滑平行金屬導(dǎo)軌MN、PQ相距L,在M點(diǎn)和P點(diǎn)間接一個(gè)阻值為R的電阻,在兩導(dǎo)軌間 OO1O1′O′ 矩形區(qū)域內(nèi)有垂直導(dǎo)軌平面向里、寬為d的勻強(qiáng)磁場(chǎng),磁感應(yīng)強(qiáng)度為B.一質(zhì)量為m,電阻為r的導(dǎo)體棒ab垂直擱在導(dǎo)軌上,與磁場(chǎng)上邊邊界相距d0.現(xiàn)使ab棒由靜止開始釋放,棒ab在離開磁場(chǎng)前已經(jīng)做勻速直線運(yùn)動(dòng)(棒ab與導(dǎo)軌始終保持良好的電接觸且下落過(guò)程中始終保持水平,導(dǎo)軌電阻不計(jì)).求:
(1)棒ab在離開磁場(chǎng)下邊界時(shí)的速度;
(2)棒ab在通過(guò)磁場(chǎng)區(qū)的過(guò)程中產(chǎn)生的焦耳熱;
(3)試分析討論ab棒在磁場(chǎng)中可能出現(xiàn)的運(yùn)動(dòng)情況.
(1)設(shè)ab棒離開磁場(chǎng)邊界前做勻速運(yùn)動(dòng)的速度為v,產(chǎn)生的電動(dòng)勢(shì)為E = BLv…(1分)
電路中電流 I = …………………………(1分)
對(duì)ab棒,由平衡條件得 mg-BIL = 0…………………(2分)
解得 v = ……………………………(1分)
(2) 由能量守恒定律:mg(d0 + d) = E電 + mv2……………………(1分)
解得 ……………………(1分)
……………………(1分)
(3)設(shè)棒剛進(jìn)入磁場(chǎng)時(shí)的速度為v0,由mgd0 = mv02,得v0 = …(1分)
棒在磁場(chǎng)中勻速時(shí)速度為v = ,則
1 當(dāng)v0=v,即d0 = 時(shí),棒進(jìn)入磁場(chǎng)后做勻速直線運(yùn) ………(1分)
2 當(dāng)v0 < v,即d0 <時(shí),棒進(jìn)入磁場(chǎng)后做先加速后勻速直線運(yùn)動(dòng)(1分)
3 當(dāng)v0>v,即d0>時(shí),棒進(jìn)入磁場(chǎng)后做先減速后勻速直線運(yùn)動(dòng)(1分)
25、(蘇、錫、常、鎮(zhèn)四市教學(xué)調(diào)查一)(14分)如圖所示,光滑且足夠長(zhǎng)的平行金屬導(dǎo)軌和固定在同一水平面上,兩導(dǎo)軌間距,電阻,導(dǎo)軌上靜止放置一質(zhì)量、電阻的金屬桿,導(dǎo)軌電阻忽略不計(jì),整個(gè)裝置處在磁感應(yīng)強(qiáng)度的勻強(qiáng)磁場(chǎng)中,磁場(chǎng)的方向豎直向下,現(xiàn)用一外力沿水平方向拉桿,使之由靜止起做勻加速運(yùn)動(dòng)并開始計(jì)時(shí),若5s末理想電壓表的讀數(shù)為0.2V.求:
(1)5s末時(shí)電阻上消耗的電功率;
(2)金屬桿在5s末的運(yùn)動(dòng)速率;
(3)5s末時(shí)外力的功率.
26、(鹽城市2008屆高三第一次調(diào)研)(14分)如圖(甲)所示,一對(duì)平行光滑軌道放置在水平面上,兩軌道相距L=1 m,兩軌道之間用R=2Ω電阻連接,一質(zhì)量為m=0.5 kg的導(dǎo)體桿與兩軌道垂直,靜止地放在軌道上,桿及軌道的電阻均忽略不計(jì),整個(gè)裝置處于磁感應(yīng)強(qiáng)度B=2 T的勻強(qiáng)磁場(chǎng)中,磁場(chǎng)方向垂直軌道平面向上.現(xiàn)用水平拉力沿軌道方向拉導(dǎo)體桿,拉力F與導(dǎo)體桿運(yùn)動(dòng)的位移s間關(guān)系如圖10(乙)所示,當(dāng)拉力達(dá)到最大時(shí),導(dǎo)體桿開始做勻速運(yùn)動(dòng),經(jīng)過(guò)位移s=2.5 m時(shí),撤去拉力,導(dǎo)體桿又滑行了s′=2 m停下.求:
(1)導(dǎo)體桿運(yùn)動(dòng)過(guò)程中的最大速度;
(2)拉力F作用過(guò)程中,電阻R上產(chǎn)生的焦耳熱;
(1)撤去拉力F后,設(shè)回路中平均電流為I,撤去拉力F時(shí)導(dǎo)體桿速度為v,由動(dòng)量定理得 -BIL·Δt=0-mv
I==BLs΄/(RΔt)
v=B2L2s΄/(mR)=8 m/s
(8分)
(2)由題知,導(dǎo)體桿勻速運(yùn)動(dòng)速度為v,此時(shí)最大拉力F與桿受的安培力大小相等,即
F=B2L2v/R
代入數(shù)據(jù)得 F=16 N
設(shè)拉力作用過(guò)程中,電阻R上產(chǎn)生的焦耳熱為Q
由功能關(guān)系可得 Q+mv2/2=WF
又由F-s圖像可知 WF=30 J
代入數(shù)據(jù)得 Q
=14 J
27、(南通、揚(yáng)州、泰州三市2008屆第二次調(diào)研)(15分)如圖甲所示,光滑絕緣 水平面上一矩形金屬線圈 abcd的質(zhì)量為m、電阻為R、ad邊長(zhǎng)度為L(zhǎng),其右側(cè)是有左右邊界的勻強(qiáng)磁場(chǎng),磁場(chǎng)方向垂直紙面向外,磁感應(yīng)強(qiáng)度大小為B,ab邊長(zhǎng)度與有界磁場(chǎng)區(qū)域?qū)挾认嗟,在t=0時(shí)刻線圈以初速度v0進(jìn)入磁場(chǎng),在t=T時(shí)刻線圈剛好全部進(jìn)入磁場(chǎng)且速度為vl,此時(shí)對(duì)線圈施加一沿運(yùn)動(dòng)方向的變力F,使線圈在t=2T時(shí)刻線圈
試題詳情
云南省昆明市2008―2009學(xué)年上學(xué)期高三期末檢測(cè)
英 語(yǔ) 試 題
本試卷分為第Ⅰ卷(選擇題)和第Ⅱ卷(非選擇題)兩部分.共150分,考試時(shí)間120分鐘。
第I卷(選擇題,共115分)
注意事項(xiàng):
1.答題前,考生務(wù)必用黑色碳素筆將自己的姓名、準(zhǔn)考證號(hào)、考場(chǎng)號(hào)、座位號(hào)在答題卡上填寫清楚,并認(rèn)真核準(zhǔn)條形碼上的準(zhǔn)考證號(hào)、考場(chǎng)號(hào)、座位號(hào)及科目,在規(guī)定的位置貼好條形碼。
2.每小題選出答案后,用2B鉛筆把答題卡上對(duì)應(yīng)題目的答案標(biāo)號(hào)涂黑。如需改動(dòng),用橡皮擦擦干凈后,再選涂其它答案標(biāo)號(hào)。答在試卷上的答案無(wú)效。
第一部分:聽力(滿分30分)
做題時(shí),先將答案劃在試卷上。錄音內(nèi)容結(jié)束后,你將有兩分鐘的時(shí)間將試卷上的答案轉(zhuǎn)涂到答題卡上。
第一節(jié) (共5小題;每小題1.5分,滿分7.5分)
聽下面5段對(duì)話。每段對(duì)話后有一個(gè)小題,從題中所給的A、B、C三個(gè)選項(xiàng)中選出最佳選項(xiàng),并標(biāo)在試卷的相應(yīng)位置。聽完每段對(duì)話后,你都有10秒鐘的時(shí)間來(lái)回答有關(guān)小題和閱讀下一小題。每段對(duì)話僅讀一遍。
例:How
much is the shirt?
A.£19.5. B.£9.15. C.£9.18.
答案是B。
1.What is the woman going to do?
A.Ask
for help. B.Leave
the window open. C.Shut
the window.
2.Where are the speakers now?
A.In
a bookstore. B.In
a library. C.In
the kitchen.
3.How was the concert?
A.Boring. B.Exciting. C.Disappointing.
4.What is probably the relationship between the
two speakers?
A.Mother
and son. B.Husband
and wife. C.Renter
and house owner.
5.What time does the flight take off?
A.At
6:50. B.At
5:50. C.At
6:10.
第二節(jié) (共15小題;每題1.5分,滿分22.5分)
聽下面5段對(duì)話或獨(dú)白。每段對(duì)話或獨(dú)白后有幾個(gè)小題,從題中所給的A,B,C三個(gè)選項(xiàng)中選出最佳選項(xiàng),并標(biāo)在試卷的相應(yīng)位置。聽每段對(duì)話或獨(dú)白前,你將有時(shí)間閱讀各個(gè)小題,每小題5秒鐘;聽完后,每小題將給出5秒鐘的作答時(shí)間。每段對(duì)話或獨(dú)白讀兩遍。
聽第6段材料,回答第6~8題。
6.When do they plan to give performances?
A.These
days. B.This
month. C.On
weekends.
7.What is Robert asked to do?
A.To
sing some songs. B.To
meet some people. C.To
play in the group.
8.Why is the man not sure of joining the group?
A.He doesn’t
think he is good enough.
B.He
doesn’t want to practise.
C.He
isn’t interested in performing.
聽第7段材料,回答第9―11題。
9.What is the woman?
A.A
student. B.A
teacher. C.A
tourist.
10.What will the woman help the foreigners practise?
A.Reading. B.Speaking. C.Writing.
11.When will the woman take the part ? time job?
A.In
the summer vacation. B.On weekends. C.Before
exams.
聽第8段材料,回答第12―14題。
12.How does the woman keep in touch with her family?
A.By
writhing letters. B.By
sending email. C.By
making phone calls.
13.Why does the man like to be online?
A.To
get interesting information.
B.To
play games.
C.To
see films.
14.What does the man suggest the woman do?
A.Make
use of the Internet.
B.Talk
about music online.
C.Make
friends all over the world.
聽第9段材料,回答第15―17題。
15.What did the man study at first?
A.Marketing. B.Chemistry. C.Language.
16.Why does the man want to give up his first job?
A.He
has to leave the company.
B.He
needs to earn more money.
C.He doesn’t
like a small company.
17.What job does the man hope to do?
A.Company
secretary.
B.International
marketing manager.
C.Software
designer.
聽第10段材料,回答第18―20題。
18.Why did the young woman put her head out?
A.She
heard someone shout.
B.She
wanted to talk.
C.She
had nothing to do.
19.Why did the young woman get angry?
A.The
board nearly hit her.
B.The
man above shouted at her.
C.She
was disturbed.
20.How can a beginner understand a new idiom?
A.By
guessing the meaning of the words.
B.By practicing
it in everyday life.
C.By
referring to a dictionary.
第二部分:英語(yǔ)知識(shí)運(yùn)用(共兩節(jié), 滿分45分)
第一節(jié) 語(yǔ)法和詞匯知識(shí)(共15小題;每小題1分,滿分15分)
從A、B、C、D四個(gè)選項(xiàng)中,選出可以填入空白處的最佳選項(xiàng),并在答題卡上將該項(xiàng)涂黑。
21.--- It's nothing serious. But do remember to
take this medicine three times a day.
--- Thank you. ________.
A.Got
it
B.Heard it C.Make it D.Take it
22.As Senior 3 students, we find it important to a good state of mind.
A.stick
to
B.a(chǎn)ttend to C.keep up D.stay up
23.______, I think, and the problem could be
settled soon.
A.Making
more effort B.So
long as you make more effort
C.If
you make more effort D.A
bit more effort
24.It is said that this is a special book, which
____ many events not found in other history books.
A.writes B.instructs C.covers D.reads
25.--- Could I ride your car to the meeting next
Monday?
--- _______. I'm afraid there might be no
space in the car.
A.You are welcome B.That
depends
C.Take it easy D.No
way
26.He has hurt her, so she won't forgive him _____
he makes an apology to her.
A.a(chǎn)lthough B.once C.if
D.unless
27.When ______ to make a list of universities in Britain, most people would start with Cambridge or Oxford.
A.to
ask B.a(chǎn)sking C.a(chǎn)sked D.a(chǎn)sk
28.--- Bad luck! We lost to their team 80-82 in the final.
--- Never mind --- it could be ________.
A.worst B.better C.best D.worse
29.--- I can't stand the loud music any longer.
Could you turn down your radio?
--- Pardon? What _______?
A.had
you said B.did you say C.have
you said D.a(chǎn)re you saying
30.--- Shall I book a table for the family reunion
dinner ahead of time?
--- Yes, you ______. The
restaurant is always full, especially during the Spring Festival.
A.will
B.might C.must D.can
31.There is no _____ in trying to persuade him to
join us, for he enjoys being alone.
A.doubt B.wonder C.difficulty D.point
32.Our teacher seems unhappy. We don’t understand
_______ it was that made him feel that way.
A.which B.what
C.why D.how
33.--- Have you ever heard of the new model of
computer, Tom?
--- Yes, of course. But I haven’t
decided whether to buy ________.
A.this
B.it
C.one
D.that
34.Unfortunately, all the equipment, the computers
and the printers included, ______ in the big earthquake.
A.was damaged B.were
damaged
C.has been damaged D.have
been damaged
35.This is an amazing area of study ______ new
discoveries are being made almost every day.
A.from which B.by
which
C.in which
D.through
which
第二節(jié) 完型填空(共20小題;每小題1.5分,滿分30分)
閱讀下面短文,掌握其大意,然后從36―55各題所給的四個(gè)選項(xiàng)(A、B、C和D)中,選出最佳選項(xiàng)
When Don Richmond and his brother Mark stole their
mother’s pocket address book one day, some 13 years ago, the two young men had
nothing but good intentions.
Their 36 - Brian, a radio personality in Singapore
and Suanne, a health advisor ? had 37 at a young age and didn’t have the means
to have a big 38 . Don and his brother had heard
their parents 39 several times that they wished they’d
been able to 40 more people to share their joy. Since
Mark was having great 41 following in his father’s footsteps as a
radio host, he felt he was 42 to give his parents the perfect 25 th
wedding 43 present ? the wedding they’d always
wanted. Don was 44 in school at that time.
The Richmond
boys got 45 . Going through the address book,
they 46 family, old friends and colleagues, as
well as made 47 to fly their grandmother in from England. At
that point, Brian had not seen 48 mother for about seven years. On the
evening of the August 1st wedding anniversary, Don and Mark 49 to meet their parents at the hotel where
the feast would take place. They’d 50 thirteen tables and all their invited
guests had already been told to remain 51 so as not to spoil the surprise. Their parents
were caught 52 unawares (出其不意地) when they
entered the room and were 53 by 130 guests yelling at the same time “Surprise!”
“My parents were truly 54 ,” says Don, now 31. “My
parents say it was their best wedding anniversary ever. But they also 55 us that peaceful dinners with
the family are pretty good, too.”
36.A.father B.mother C.parents D.brothers
37.A.met B.married C.a(chǎn)rgued D.separated
38.A.meeting B.party C.picnic D.wedding
39.A.mention B.regret C.a(chǎn)nnounce D.inform
40.A.invite B.force C.cause D.require
41.A.job B.success C.surprise D.business
42.A.likely B.friendly C.a(chǎn)ble D.honest
43.A.ceremony B.a(chǎn)nniversary C.celebration D.a(chǎn)ctivity
44.A.a(chǎn)lready B.yet C.a(chǎn)lso D.still
45.A.busy B.relaxed C.curious D.puzzled
46.A.found out B.thought
of C.rang
up D.called
on
47.A.comments B.plans C.jokes D.guesses
48.A.its B.their C.her D.his
49.A.failed B.a(chǎn)rranged C.tried D.hurried
50.A.booked B.bought C.a(chǎn)sked D.borrowed
51.A.a(chǎn)ctive B.calm C.quiet D.happy
52.A.completely B.foolishly C.silently D.finally
53.A.found B.praised C.greeted D.noticed
54.A.interested B.pleased C.scared D.shocked
55.A.request B.promise C.warn D.remind
第三部分:閱讀理解(共20小題,每題2分,滿分40分)
閱讀下列短文,從每題所給的四個(gè)選項(xiàng)(A、B、C和D)中,選出最佳選項(xiàng)。
A
My name is Hua Fei and I am a sporting robot of
the 23rd century. I am an expert at high flying exercises. I jump
from spaceships and as I fall I turn, dive circle and dance until I softly land
as close as I can to the finishing line. Robot competitions in the 23rd
century are truly a popular sport. Fans from all over China watch their
handheld TVs when a competition comes on. Last time I took part in the 78th
Olympics on a flying island above Brussels
in the sky. I won the silver medal for my performance.
This year I had the honour to be chosen again. I
wanted to meet robots from other countries and explore ideas about sport.
However, my programmer fell ill the week before we were going to leave. It was
very painful for her and I felt very frightened. I no longer felt so confident
that I would win. The day of the competition was rather cold for my legs and my
special oil began to freeze. I paused before I jumped from the starting place
on a little spaceship but then I began my performance. At the correct moment I
tried to open my parachute but there was a problem. It only opened a little.
Instead of flying softly to earth I began to fall faster and faster so that I
could not turn, dive, circle or dance. My heart stopped beating as I landed
heavily on a mountain covered with snow.
This is why I am writing to you from my hospital
bed with two broken legs and a fragile (易碎的) head. I did not
win anything at the Olympics after all. I need the factory to build me two new
legs and an even bigger head. Then I will be able to compete once more. Let’s
hope for greater success in the next Olympics!
56.What we know about Hua Fei is that he is .
A.a(chǎn)n
experienced expert B.a(chǎn)
computer system
C.a(chǎn)
flying spaceship D.a(chǎn)
sporting robot
57.According to the passage, would be a popular sport in the 23rd
century.
A.computer
games B.robot
competitions
C.plane
controlling D.sky
diving
58.The reason why Hua Fei failed to perform well
this year is that .
A.he
didn’t do it in the right way B.he
couldn’t open his parachute
C.he
didn’t replace the batteries D.he
was affected by a wrong programme
59.At the moment, Hua Fei is .
A.being
treated in a hospital B.being
repaired in a factory
C.being
trained for the next Olympics D.being
taught to do high flying exercises
B
Phyllis Lee of Singapore knew something wasn’t
right. Her younger son, Alex, then six years old, was getting good grades in
his private kindergarten classes. But Lee realized something was wrong when
Alex came home one day, crying, with “zeroes” on his Chinese spelling test. Lee
decided to investigate. According to Lee, the teacher would frequently describe
Alex’s Chinese writing as ‘ghost writings’ and made him a laughing stock in
class instead of helping him out.
Lee, 46, spent the next 12 months teaching Alex
and still helps him when necessary. She not only taught him the formation of
the Chinese words but also their origin so that he could understand better,
often taking more than an hour to read a simple paragraph. Visits to the
library and surfing the Internet kept her up to speed on teaching materials.
Alex’s grades improved and by the end of Year One, he had become one of the top
students in Chinese in his class.
Alex is keeping an A ? plus average in all
subjects, and his mother’s involvement is a big reason behind it. Alex, now 11,
recently wrote a book recording his struggles with Chinese, which an
international education center has published to inspire its students. He
sometimes writes for local student magazines as well.
Lee has always had input into the education of
Alex. She reads to him “all the time.” As a result, he is an eager reader who
regularly visit the library.
To Lee, one of the most valuable things she does
is to take turns with her husband to drive Alex to school. “We’d talk along the
way. Talking enables me to have a better understanding of my child and reminds
me of changes every now and then so that I know when to get involved, she says.”
60.Alex arrived home with tears because .
A.he
failed in the Chinese exam B.his
teacher punished him
C.he
didn’t want to learn Chinese D.his
classmates did him wrong
61.Alex succeeded in learning Chinese with .
A.his
teacher’s guide B.his
classmates’ help
C.his
father’s influence D.his
mother’s instruction
62.For Alex the great achievement recently is that .
A.he
gets A’s in some subjects B.he
wrote a book
C.he
earns some money D.he
understands Chinese better
63.Lee’s education method succeeds mainly because
of her .
A.involvement B.communication C.tolerance D.encouragement
C
So
you want to be a writer … Send us your joke, anecdote or story, and if we
publish it in the
magazine, we’ll pay as follows:
●MY STORY $ 500 ●FACTS
OF LIFE
Personal stories beyond the call of We
do not pay for these articles, but why
daily life. They must be unpublished, not
share your question with the world?
original and less than 1000 words. ●SUBMIT
(提交) YOUR ITEM
●EVERYDAY HEROES $ 100 Jokes
rdasia. com/jokes
Have you heard of an ordinary person Comments
rdasia.com/comments
who has done something extraordinary? Stories
rdasia.com/submit
Tell us about the person and, if we Fax
(65) 6749 ? 3616
feature them, we’ll pay you $ 100 for Post
Please mark your articles clearly
finding the hero. and
mail to: Reader’s Digest Asia,
●ANECDOTES AND JOKES $
100 Editorial
Department, Singapore Post Centre,
Funny things can happen at work and PO Box 272, Singapore
914010
at home ? especially when kids are ●THE
FINE PRINT:
around to pass comment. We may run Include
your name, address and phone
your gem (佳作) in Life’s Like That, All in number.
All articles become our property
a Day’s Work or As Kids See it, or as on
payment and publication in the magazine.
a short filler. Got a new joke? Send We
reserve the right to edit and cannot
it in for Laughter, the Best Medicine. return
material not accepted for publication.
64.The purpose of this advertisement could be to .
A.encourage
people to writers B.persuade
people to buy the magazine
C.a(chǎn)ttract
people to write articles D.let
people make a living by writing
65.If you want to get $ 500, your article has to be
.
A.a(chǎn)bout
personal stories B.a(chǎn)bout
heroes
C.chosen
and published before D.rewritten
from other articles
66.Laughter, the Best Medicine and Life’s Like That
are two .
A.books B.a(chǎn)rticles C.programmes D.columns
67.In the advertisement, rdasia. stands for .
A.Record
Digital Asia B.Reader’s
Digest Asia
C.Remember
Day Asia D.Register
Date Asia
D
Last week at a friend’s birthday party, there
was a mooncake eating contest and I persuaded my good friend Jonathan to take
part in it. Even though he had just finished a big dinner, he managed to win
the contest. Not only did he win a bottle of nice whiskey, but also a big box
of expensive Hong Kong mooncakes. A few days
later, I was hosting an opening party for my new office. Jonathan showed up with
the lovely box of Hong Kong mooncakes he had
won the other night. I thought it was a lovely joke, and the mooncakes were
delicious. Still, it got me thinking about the concept of regifting in China.
In the States, we have a tradition around
Christmas similar to giving mooncakes, only we call them fruitcakes. Fruitcakes
are made from terrible preserved (加工過(guò)的) fruit and nobody
likes to eat them. You often find your friends giving the fruitcake you gave
them to someone else, and so on. But fruitcakes aside, it isn’t very often to
catch someone regifting something in America, as it’s seen to be very cheap and
embarrassing (尷尬的). An obvious way to tell if something has been
regifted is to check the wrapping (包裝).
However, many of my friends in China will
proudly regift an old gift, especially if it is still wrapped in a pretty box. I
find it somewhat uncomfortable to receive a gift that I know wasn’t bought for
me. But I also understand that the gift is perfectly good, it just lacks the
special meaning of being picked out by a friend. There are many occasions in
Chinese culture when gifts are necessary. There are traditional items such as
tea, cigarettes and liquor which seem fine to regift. These gifts are not
personal and have no special meaning. But is it really proper to give someone
something that was never bought for them in the first place?
68.This article is written to .
A.praise
some customs in China B.question
a social practice
C.show
how to regift D.tell
an embarrassing story
69.Which of the following is TRUE according to the
passage?
A.Americans
often regift things on holidays.
B.Regifting
can hardly be seen in China.
C.It
is comfortable to be seen to regift in America.
D.It
is acceptable to regift some traditional items in China.
70.The second paragraph is mainly about in
the USA.
A.giving
fruitcakes B.regifting
C.checking
the wrapping of gifts D.Christmas
tradition
71.The author thinks it really uncomfortable to
receive .
A.a(chǎn)n
expensive gift from a close friend B.a(chǎn) gift
given again by a friend
C.some
items such as tea and cigarettes D.a(chǎn)
box of mooncakes from Hong Kong
E
The Internet is now a central part of everyday
life. The number of Internet hours in the West is increasing each month, but
online addiction is still not attracting a great deal of attention.
Perhaps one reason Internet addiction has not taken
off in the West is that there are too many other vices (不良事物)
available. In a society relatively open to sex, gambling, alcohol and drugs,
computer games are not always appealing to young people. In fact, there is
almost a shame attached to playing online games. Many consider it an “uncool”
thing to do. They would rather spend their free time meeting friends.
But this is not to say that people don’t do it.
One website, wowdetox.com, still offers support to recovering “addicts”. One
user posted on the website: “I would play all night and spend all day sleeping.
I just quit a month ago. Best decision ever.” This is just one example from
around 1,660 pages of confessions (坦言). Still, computer
game addiction is not officially recognized in the West. Just last years, the
American Medical Association refused calls to have computer game addiction
classified (分類) as a disease, saying that, “Nothing suggests it is a
complex disease similar to alcoholism.”
Online gaming is more personal in the West. It
is rare for people to visit Internet cafes or play with friends at home. After
all, the majority of households have their own fast Internet connection. This
removes the social joy with friends. And this choice of playing alone is not
very appealing to many people.
72.Why hasn’t Internet addiction become a big
problem in the West?
A.Surfing
the Internet is not convenient.
B.People
have other choices for fun.
C.The
government has taken proper measures.
D.People
are too busy with their work.
73.The underlined part in Paragraph 2 is closest in
meaning to .
A.become
popular quickly B.left
some place
C.got
one’s clothes off D.taken
something away
74.According to the passage, which of the following
is TRUE in the USA?
A.Personal
playing online is attractive.
B.Computer
game addiction is officially recognized.
C.It
is a shame to play too much online games.
D.Online
game addition is considered similar to alcoholism.
75.We can learn from this passage that .
A.surfing
the Internet is not so attractive in the west
B.many
other things interest western people
C.the
Internet is a central part of everyday life
D.online
games are getting more attractive in the west
第Ⅱ卷(共35分)
第四部分:寫作(共兩節(jié),滿分35分)
第一節(jié) 短文改錯(cuò)(共10小題;每小題1分,滿分10分)
此題要求改正所給短文中的錯(cuò)誤.對(duì)標(biāo)題號(hào)的每一行做出判斷:如無(wú)錯(cuò)誤,在該行右邊的橫線上劃(√);如有錯(cuò)誤(每行只有一個(gè)錯(cuò)誤),則按下列情況改正:
此行多一個(gè)詞:把多余的詞用斜線劃掉,在該行右邊橫線上寫出該詞,并也用斜線劃掉。
此行缺一個(gè)詞:在缺詞處加一個(gè)漏字符號(hào)(^),在該行右邊橫線上寫出該加的詞。
此行錯(cuò)一個(gè)詞:在錯(cuò)的詞下劃一橫線,在該行右邊橫線上寫出改正后的詞。
注意:原行沒(méi)有錯(cuò)的不要改。
Have you ever suffered from some pains while
grow up? 76.
Don't worry. I'll tell you some possible ways to
deal with it. 77.
If you have few friends because you are shyly,
you
78.
may try to say hello to your classmates with
smile
79.
first or start to talk with them first. Then
you'll find
80.
they are friendly but very easy to get along
with.
81.
To get good grades, you had to stop reading
entertainment 82.
magazine, and try your best to learn your
lessons well.
83.
Believe on yourself, and you'll be successful.
If you have any
84.
questions, and you can turn to your friends or
teachers for help. 85.
第二節(jié) 書面表達(dá)(滿分25分)
假如你是李華,對(duì)好萊塢環(huán)球影城(Hollywood
Universal Studio)很感興趣。于是寫信給你的美國(guó)筆友Peter,詢問(wèn)有關(guān)影城的情況。要點(diǎn)如下:
1.影城的位置;
2.游客可以參加的活動(dòng);
3.游覽所需的時(shí)間;
4.游覽的大概費(fèi)用。
注意:
1.詞數(shù)100左右;
2.可以適當(dāng)增加細(xì)節(jié),以使行文連貫;
3.開頭語(yǔ)已為你寫好。
Dear Peter,
How’s everything going?
Yours,
Li Hua
試題詳情