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25.    He said he would come before sunrise; he didn’t, _________. I will never trust him any longer.

A. either    B. though      C. still      D. then

試題詳情

24.    It took a few seconds for her eyes to _________ the darkness.

A. aim at   B. throw light upon C. rely on     D. adjust to

試題詳情

23.    I promise that you _________ have 20 dollars if you clean all the windows.

A. will        B. would  C. should      D. shall

試題詳情

22.    -Excuse me, could you tell me the way to Chao Tianmen Square?

-Sorry, I’m a stranger here.

-___________.

A. Thanks, anyway      B. It doesn’t matter    

C. Never mind          D. No problem

試題詳情

第一節(jié):單項填空(共15小題;每小題1分,滿分15分)

從A、B、C、D四個選項中,選出可以填入空白處的最佳選項。

21.    At _________ first sight, the twins look exactly _________ same.

A. the; a    B. a; the    C. /; the    D. the; /

試題詳情

20.                                  (19分) 如圖所示,在傾角、足夠長的斜面上分別固定著兩個相距L = 0.2m的物體A、B,它們的質(zhì)量mA = mB =1kg,與斜面間的動摩擦因數(shù)分別為.在t = 0時刻同時撤去固定兩物體的外力后,A物體將沿斜面向下運動,并與B物體發(fā)生連續(xù)碰撞(碰撞時間極短,忽略不計),每次碰后兩物體交換速度.g取10m/s2.求:

西南師大附中2008-2009學年度下期期末考試

試題詳情

19.                                  (16分) 如圖所示,在傾角為的光滑斜面上端系著一勁度系數(shù)為k的輕彈簧,彈簧的下端連有一質(zhì)量為m的小球,球被一垂直于斜面的擋板A擋住,此時彈簧沒有形變.若手持擋板A以加速度a(a < gsin)沿斜面向下做勻加速運動,求:

(1) 從擋板開始運動到球與擋板分離所經(jīng)歷的時間;

(2) 從擋板開始運動到小球的速度達到最大,球所經(jīng)過的路程.

試題詳情


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