问题 选择题

玻璃杯底压一条纸带,如图所示。现用手将纸带以很大的速度从杯底匀速抽出,玻璃杯只有较小位移。如果以后每次抽纸带的速度都相同,初始时纸带与杯子的相对位置也相同,只有杯中水的质量不同,下列关于每次抽出纸带的过程中杯子的位移的说法,正确的是(        )

A.杯中盛水越多,杯子的位移越大

B.杯中盛水越少,杯子的位移越大

C.杯中盛水多时和盛水少时,杯子的位移大小相等

D.由于杯子、纸带、桌面之间的动摩擦因数都未知,所以无法比较杯子的位移大小

答案

答案:C

阅读理解

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

"No man is an island" is a well-known line from John Donne's Devotion, written more than three hundred years ago. Even now people still agree with him. Without other people, life became empty and sad.  小题1:

For some of us, though making friends is not difficult, we may not want to make the first move. It is also difficult at times to keep the friends we already have.

There are many books about friendship, but Dale Carnegie's How to Win Friends and Influence People, written in 1936, is the most famous.  小题2: It was later put into 28 languages.

Here is the list of advice from his book:

 小题3:

Always greet with a smile. Begin with "excuse me" or "would you please", when you want to ask somebody. Remember to say "thank you" and try to be as helpful as you can.

Go out of your way to be nice.

 小题4: Making some soup for a sick neighbour may seem like a little thing to you, but it will make your neighbour feel a lot better.

Remember names.

They say that the sweetest music to a person's ears is the sound of his or her own name.

 小题5:

Try to understand other people's ways and ideas and learn something from them.

Listen patiently.

When someone is talking to you, look at him or her, listen carefully and say something when necessary.

A.Be open-minded.

B.Be friendly and polite.

C.So we all need to have friends.

D.Save some time to help others.E. This "How to" book became a best seller.

F. Try to help your friends out of danger.

G. It's also important to keep close friends in our daily life.

单项选择题