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问题 选择题

下列有关海底地形的叙述，错误的是[ ]

A．大陆架位于洋盆中，坡度较缓

B．大陆坡水深急剧增至数千米

C．大洋中脊火山活动比较强烈

D．海沟是海洋底部最深的地方

答案

答案：A

完形填空
完形填空。
     Peter  1  very early in the morning. He  2  and goes out to in the open air. Then he has breakfast. Every
day he goes to school  3 .  4   four classes in the morning. After class, he  5   some books.  6  is at twelve.
After lunch he  7   a short rest. In the afternoon he has two classes. Then he has half an hour  8  sports (运动).
He plays pingpong  9  football. In the evening he does his  10  at home. He goes to bed at ten thirty.
( )1. A. get       
( )2. A. washes    
( )3. A. on his bike
( )4. A. Have      
( )5. A. reads     
( )6. A. Breaskfast
( )7. A. has       
( )8. A. in        
( )9. A. and       
( )10. A. words      		B. gets up  
B. wash     
B. on bike  
B. Has      
B. watches  
B. Supper   
B. have     
B. on       
B. or       
B. housework 		C. gets on   
C. wear      
C. by his bike
C. There is  
C. sees      
C. Meal      
C. take      
C. for       
C. but       
C. homework   		D. gets         
D. wears        
D. rides his bike
D. There are    
D. looks        
D. Lunch        
D. taking       
D. to                              
D. so           
D. homeworks    
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选择题

如图木块A放在木块B的左端A、B接触面粗糙，用恒力F将A拉至B的右端，第一次将B固定在地面，F做功为W1，第二次将B放在光滑地面上，F做功为W2，比较二次做功应有（　　）

A．W1＜W2

B．W1=W2

C．W1＞W2

D．不能确定
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