2.(09·全國卷Ⅱ·19)圖中虛線為勻強(qiáng)電場中與場強(qiáng)方向垂直的等間距平行直線。兩粒子M、N質(zhì)量相等，所帶電荷的絕對(duì)值也相等。現(xiàn)將M、N從虛線上的O點(diǎn)以相同速率射出，兩粒子在電場中運(yùn)動(dòng)的軌跡分別如圖中兩條實(shí)線所示。點(diǎn)a、b、c為實(shí)線與虛線的交點(diǎn)，已知O點(diǎn)電勢高于c 點(diǎn)。若不計(jì)重力，則　 (　 BD )　　　　　　　　

A. M帶負(fù)電荷，N帶正電荷

B. N在a點(diǎn)的速度與M在c點(diǎn)的速度大小相同

C. N在從O點(diǎn)運(yùn)動(dòng)至a點(diǎn)的過程中克服電場力做功

D. M在從O點(diǎn)運(yùn)動(dòng)至b點(diǎn)的過程中，電場力對(duì)它做的功等于零

解析：本題考查帶電粒子在電場中的運(yùn)動(dòng).圖中的虛線為等勢線,所以M點(diǎn)從O點(diǎn)到b點(diǎn)的過程中電場力對(duì)粒子做功等于零,D正確.根據(jù)MN粒子的運(yùn)動(dòng)軌跡可知N受到的電場力向上M受到的電場力向下,電荷的正負(fù)不清楚但為異種電荷.A錯(cuò).o到a的電勢差等于o到c的兩點(diǎn)的電勢差,而且電荷和質(zhì)量大小相等,而且電場力都做的是正功根據(jù)動(dòng)能定理得a與c兩點(diǎn)的速度大小相同,但方向不同,B對(duì)。

1.(09·年全國Ⅰ·18)如圖所示，一電場的電場線分布關(guān)于y軸(沿豎直方向)對(duì)稱，O、M、N是y軸上的三個(gè)點(diǎn)，且OM=MN，P點(diǎn)在y軸的右側(cè)，MP⊥ON，則　　 (　 AD　 )

A.M點(diǎn)的電勢比P點(diǎn)的電勢高

B.將負(fù)電荷由O點(diǎn)移動(dòng)到P點(diǎn)，電場力做正功

C. M、N 兩點(diǎn)間的電勢差大于O、M兩點(diǎn)間的電勢差

D.在O點(diǎn)靜止釋放一帶正電粒子，該粒子將沿y軸做直線運(yùn)動(dòng)

解析：本題考查電場、電勢、等勢線、以及帶電粒子在電場中的運(yùn)動(dòng).由圖和幾何關(guān)系可知M和P兩點(diǎn)不處在同一等勢線上而且有,A對(duì).將負(fù)電荷由O點(diǎn)移到P要克服電場力做功,及電場力做負(fù)功,B錯(cuò).根據(jù),O到M的平均電場強(qiáng)度大于M到N的平均電場強(qiáng)度,所以有,C錯(cuò).從O點(diǎn)釋放正電子后,電場力做正功,該粒子將沿y軸做加速直線運(yùn)動(dòng)。

2009年高考新題

第三節(jié)：書面表達(dá)(滿分30分)

　　 假設(shè)你是小明，你家打算改善住房條件。現(xiàn)有兩套房子供選擇：一套是郊區(qū)的傳統(tǒng)式平房，一套是位于商業(yè)區(qū)的現(xiàn)代公寓樓。家人對(duì)購買哪套更好持不同的觀點(diǎn)。請(qǐng)你根據(jù)下表所給內(nèi)容，用英語給你的朋友Paul寫一封信，征求他的意見。

注意：1. 表達(dá)須包括所提供的所有信息，并可適當(dāng)發(fā)揮；2. 詞數(shù)：100左右；3. 開頭已為你寫好，不計(jì)入總數(shù)。 4. 參考詞匯：郊區(qū) suburbs

Dear Paul,

　　 Recently my family are planning to improve our housing conditions

2009-2010學(xué)年度下學(xué)期第二次調(diào)研考試

第二節(jié) 短文改錯(cuò) (共10小題; 每小題1.5分, 滿分15分)　 (見答題紙)

第一節(jié) 單詞拼寫 (共10小題; 每小題1分, 滿分10分)

根據(jù)下列句子所給首字母,寫出空缺處各單詞的正確形式. (每空只寫一詞)

66. To “be hard up” is an English i_____ meaning “to lack money”.

67. The lecture is given by one of the few writers _____(投稿) to the magazine.

68. She is _____ (驚人地)beautiful. Everyone admires her.

69. Everyone is interested in the comedies _______(呈現(xiàn)、公演) on the Eve of Spring Festival.

70. He read the article from one p____ to another.

71. In this part of the city, you can see ancient and m______ buildings next to each other.

72. I'm afraid this isn't a very c_______ time. Could you call back later?

73. Seriously i____ in the accident, he was immediately taken to the hospital.

74. Our teachers are teaching us to be good _______(公民) .

75. The president is holding a peace talk with the foreign minister of another nation. The _____(氛圍)　 of the meeting is very warm and friendly.

根據(jù)對(duì)話內(nèi)容，從對(duì)話后的選項(xiàng)中選出能填入空白處的最佳選項(xiàng)。選項(xiàng)中有兩項(xiàng)為多余選項(xiàng)。(注意：61-65題也涂到卡上　 E=AB　　 F=AC　　 G=AD)

(Wang goes to Boston by train. Now he is at the inquiry offices.)

　Clerk: May I help you, Sir?

　 Wang: Yes, I’d like some information about the trains to Boston.

　 Clerk: ____61______

　 Wang: Tomorrow. I have to be there well before lunch time.

Clerk: There’s a train at 6 a.m.　 It’ll get you there at 11 a.m. ___62_

　 Wang: And I have to get up very early too. ______63____

Clerk: Yes, There’s one at 8:30 a.m. train. That arrives in Boston at 11:40 a.m.

　 Wang: I think the 8:30 train will be my best choice. ____64_____

　 Clerk: Do you want to buy a single fare or round trip ticket?

　 Wang: What’s the difference?

　 Clerk: A round trip ticket saves you about 15 percent of the fare.______65____

　 Wang: A second class.

A. Where do we pay the fare?

B. But there are many stops along the way.

C. What’s the fare?

D. When do you want to go?

E. Do you prefer a first class ticket or a second class?

F. Are there any non-stops to Boston?

G. I’ve got plenty of pocket money.

第二卷 (請(qǐng)寫在答卷紙上)