1. 短文需寫在答題卡的指定區(qū)域。
2. 給Grown-up提出解決問題的具體建議。
要求:
Passage 1
(09·北京--情景作文)
假設(shè)你是紅星中學(xué)高三一班的學(xué)生李華為響應(yīng)綠化祖國(guó)的號(hào)召, 你班四月十二日去郊區(qū)植樹。請(qǐng)根據(jù)一下四幅圖的先后順序, 介紹指數(shù)活動(dòng)的全過程, 給某英文雜志的“綠色行動(dòng)”專欄寫一篇以“Green Action in Our Class”為題的英文稿件。
注意: 字?jǐn)?shù)不少于60。
提示詞: 郊區(qū) suburbs
[參考范文]
Green Action in Our Class
April 12 is memorable because our class had a meaningful experience on that day. In the morning, we bicycled to the suburbs to plant trees, talking and laughing all the way. Upon arrival, we began to work immediately. Some were digging holes. Some were carrying and planting young trees. Others were watering them. After getting the work done, we put up a board reminding people to protect the trees. Before leaving we took some photos to record our green action. Seeing the lines of trees, we all had a sense of achievement. We feel it's our duty to protect and beautify our environment.
Passage 2
(09·北京--開放作文)
根據(jù)下面提示, 寫一篇短文, 字?jǐn)?shù)不少于50.
In your spoken English class, your teacher shows you the following picture. You are asked to describe the picture and explain how you understand it.
[參考范文]
What an interesting picture! A Western young man, sitting at a table, is ready to eat a bowl of noodles. He is holding two forks the same way as we Chinese hold chopsticks. He is trying so hard to pick up the noodles that he is sweating a lot. At first glance, I think it's a bit funny, for we Chinese take for granted that chopsticks are the tools for eating noodles. The man in the picture is trying to copy us. Obviously he is doing it the hard way. Maybe using one fork will do a better job. In my opinion, we don't need to copy other's ways of thinking. Sometimes a simpler way of doing things may be a better way.
Passage 3
(09·陜西)
假定你是李華。在一個(gè)英文網(wǎng)絡(luò)論壇上, 你看到一個(gè)名叫Grown-up的中學(xué)生發(fā)帖(post)尋求幫助, 請(qǐng)根據(jù)帖子內(nèi)容, 寫作要點(diǎn)和要求回貼。
寫作要點(diǎn):
1. 告訴Grown-up要理解母親;
2、 如圖示:光從A點(diǎn)射入圓形玻璃,并從B點(diǎn)射出,若射出玻璃與射入玻璃的光線夾角為30°,AB弧所對(duì)的圓心角為120°,下列說法正確的是:( C )
A. 在A點(diǎn)的入射角為30°
B. 在B點(diǎn)的入射角為45°
C. 玻璃的折射率為
D. 玻璃的折射率為
解:光路圖作,由于對(duì)稱性,∠1=60 ° ∠2=15 ° ∠i =45
|
3:如圖,a和b 都是厚度均勻的平玻璃板,它們之間的夾角為φ,一細(xì)光束以入射角θ從P點(diǎn)射入,θ > φ,已知此光束由紅光和藍(lán)光組成,則當(dāng)光束透過b板后, ( D )
A.傳播方向相對(duì)于入射光方向向左偏轉(zhuǎn)φ角
B.傳播方向相對(duì)于入射光方向向右偏轉(zhuǎn)φ角
C.紅光在藍(lán)光的左邊
D.紅光在藍(lán)光的右邊
二計(jì)算題
4: 光屏MN 和遮光板PQ彼此平行地豎直放置,它們相距10cm,遮光板PQ上有一直徑為1cm 的圓形透光孔ab,位于遮光板左側(cè)20cm 處有一點(diǎn)光源S,如圖示,在點(diǎn)光源S下方水平放置一塊平面鏡使點(diǎn)光源發(fā)出的光通過圓孔ab后在光屏MN上形成兩個(gè)光斑,兩個(gè)光斑外邊緣上下距離為5.5cm,作圖計(jì)算平面鏡距點(diǎn)光源的豎直距離。
解:作光路圖,由相似關(guān)系A(chǔ)B=A1B1=1.5cm A1B=5.5cm ∴ BB1 =4cm ΔBB1b ∽ ΔSS1b SS1 / BB1 = SS 1/Aa=2
∴ SS1 =8cm h=1/2×SS1 =4cm
5: 如圖示,一束平行光照射在半徑為R的半圓柱形玻璃磚的圓柱面上,光線a是與一條半徑重合的光線,該光線照射到圓心O點(diǎn)與直徑AB夾角為45°,且剛好發(fā)生全反射.請(qǐng)作圖并確定出光線能從AB面射出的范圍.
答案;
6:如圖示,一不透明的圓柱形容器內(nèi)裝滿折射率n =的透明液體,容器底部正中央O點(diǎn)處有一點(diǎn)光源S,平面鏡MN與底面成45°角放置,若容器高為2dm,底面半徑為(1+ )dm,OM=1dm,在容器中央正上方1dm 處水平水平放置一足夠長(zhǎng)的刻度尺,求光源S 發(fā)出的光經(jīng)平面鏡反射后,照射到刻度尺上的長(zhǎng)度。(不考慮容器側(cè)壁和液面的反射)
解:作出光路圖如圖示:由幾何關(guān)系得:M S' = M S =1dm S'P=3dm PQ= dm
答案
19.(北京市豐臺(tái)區(qū)2008年4月高三統(tǒng)一練習(xí)一)已知, ,,.
(Ⅰ)當(dāng)時(shí),求使不等式成立的x的取值范圍;
(Ⅱ)求使不等式成立的x的取值范圍.
解 (Ⅰ)當(dāng)時(shí),,.
.
∵ ,
∴ 解得 或.
∴ 當(dāng)時(shí),使不等式成立的x的取值范圍是
.
(Ⅱ)∵ ,
∴ 當(dāng)m<0時(shí),;
當(dāng)m=0時(shí), ;
當(dāng)時(shí),;
當(dāng)m=1時(shí),;
當(dāng)m>1時(shí),.
18.(四川省巴蜀聯(lián)盟2008屆高三年級(jí)第二次聯(lián)考)設(shè)向量,其中.
(1)求的取值范圍;
(2)若函數(shù)的大小
解 (1)∵,
∴,
∵,∴,∴,
∴。
(2)∵,
,∴,
∵,∴,∴,∴
17.(北京市東城區(qū)2008年高三綜合練習(xí)二)已知Rt△ABC的斜邊BC=5,則的值等于 .
答案 -25
16.(北京市朝陽區(qū)2008年高三數(shù)學(xué)一模)已知,且,∠AOB=60°,則=____;與的夾角為_____.
答案 2,
15.(安徽省巢湖市2008屆高三第二次教學(xué)質(zhì)量檢測(cè))已知向量,,則的值為 .
答案 1
14.( 江蘇省濱?h2008高三第三次聯(lián)考數(shù)學(xué)試卷)不共線的向量,的模都為2,若,,則兩向量與 的夾角為
答案 90°
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