问题 选择题

如图所示,两只小船静止在水面上,右边的小船上的人用力撑开左边的那一只小船,关于两只小船的下列说法中正确的是(  ) 

A.右边小船对左边小船的作用力较大

B.右边小船的惯性较大

C.右边的船向左运动,左边的船向右运动

D.左边的船向左运动,右边的船向右运动。

答案

答案:D

题目分析:由于力的作用是相互的,相互作用的两个力大小相同,所以右边小船对左边小船的作用力和左边小船对右边小船的作用力大小相同。故A不正确;右边小船对左边小船的作用力使左边的船向左运动,左边小船对右边小船的作用力使右边的船向右运动,故C不正确,D正确。惯性的大小与物体质量有关,右边小船的惯性不一定大,B不正确。故选D

阅读理解

阅读理解。

     Lots of families in Great Britain have one or more pets. Dogs are the favorite pets and there are

about 6,000,000 0f them in Britain. The second favorite are cats (about 5,000,000) and the third favorite

is a kind of bird - the budgie  (虎皮鹦鹉). Some families do not keep cats or dogs. They keep other

animals as pets in their homes. There are more than l2, 000,000 pets in Britain.

    The British take good care of (照顾) their pets. They give them nice names: Rover, Rex, Cindy,

Misty (for dogs); Albert, Snowy, Fluffy, Tom (for cats) ; Polly, Chatterbox (for parrots );  Guy,

Scamper, Shipley ( for monkeys). When they speak of their pets, they say, "He", "She" (not "It").

    The British give their pets nice food to cat. They buy food for their pets in pet shops. The British

are pet lovers!

1. There are over _______ pets in Great Britain.       

A. 5, 000,000            

B. 6, 000,000        

C. 11, 000,000           

D. 12, 000,000

2. In Britain, monkeys usually have names like _______ and _______.        

A. Chatterbox; Scamper        

B. Shipley; Guy        

C. Rover; Cindy        

D. Misty; Snowy

3. British people give their pets _______ and _______.        

A. houses; nice names        

B. food; houses        

C. nice names; nice food        

D. pet shops; pet food

4. Look at my doggy! _______ is a nice boy, right?         

A. He        

B. It        

C. She        

D. Dog

5. The best title (题目) for the passage is _______.         

A. Animals in Britain         

B. Pet's Name         

C. Pets in Britain             

D. Dog Pets

多项选择题