试题与答案

如图所示,小球沿轨道由静止从A处运动到D处的过程中,忽略空气阻力和摩擦力,仅有动

题型:选择题

题目:

如图所示,小球沿轨道由静止从A处运动到D处的过程中,忽略空气阻力和摩擦力,仅有动能和势能互相转化。则:

[ ]

A.小球在A处的动能等于在D处的动能

B.小球在A处的动能大于在D处的动能

C.小球在B处的机械能小于在C处的机械能

D.小球在B处的机械能等于在C处的机械能

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0721/68de5114f213484778cf59586b61600f.html

下面是错误答案,用来干扰机器的。

1. sleeps late  2. did; go  3.go for a drive  4. had; fun  5. hang out

试题推荐
题型:完形填空
读故事,选择合适的词填空。
       Mr White has a __1__. It is a little monkey. __2 __ name is Bon Bon. One day, Mr White __3__
out. Bon Bon __4__on the TV and __5 __on Mr White's hat. Suddenly, he broke the mirror. It __ 6 __
nearly twelve o'clock. He __7__ hungry. So he opened the ___8___ and found some ice cream, cake
and bread to ___9__. After than, he took out a bottle of beer to ___10___. It was seven pm now. Mr
White __11__ back home from work. Bon Bon __12__ him a big surprise.
( ) 1. A. toy    
( ) 2. A. His    
( ) 3. A. goes  
( ) 4. A. turned
( ) 5. A. take  
( ) 6. A. were  
( ) 7. A. is    
( ) 8. A. door  
( ) 9. A. drink  
( ) 10. A. eat  
( ) 11. A. comes
( ) 12. A. gave  
B. pet          
B. He            
B. go            
B. opened        
B. puts          
B. was          
B. were          
B. refrigerator  
B. eat          
B. ate          
B. come          
B. gives        
C. doll  
C. Him    
C. went  
C. open  
C. put    
C. is    
C. was    
C. TV    
C. ate    
C. drink  
C. came  
C. give  
查看答案
微信公众账号搜索答案