问题 多选题

如图所示.将正在发声的音叉紧靠在悬线下的乒乓球上,发现乒乓球被多次弹开.关于这个实验下列说法不正确的是(  )

A.乒乓球被弹开说明声音可以传递能量

B.用乒乓球的目的是把音叉的微小振动放大,便于观察

C.在月球上做此实验看到的乒乓球不会被弹起

D.越用力敲击音叉乒乓球弹起的越高说明频率越大音调越高

答案

A、乒乓球被弹开说明发声的音叉在振动,故A错误;符合题意;

B、用乒乓球的目的是把音叉的微小振动放大,便于观察,故B正确,不符合题意;

C、在月球上做此实验看到的乒乓球会被弹起,但听不到声音,故C错误,符合题意;

D、越用力敲击音叉乒乓球弹起的越高说明振幅越大,响度越大,故D错误,符合题意.

故选ACD.

阅读理解

If you want to make friends, what should you do?

Steps:

★Try to look on the bright side of things.

★Look for groups in your area that do something you are interested in. Maybe you will learn some new skills and meet some people who have many things in common with you.

Tips(建议,诀窍):

Contact your friends at least once a week by telephone or e-mail, or by visiting them to find out how they are. Remember important things about them such as birthdays and weddings(婚礼).

★If you have an argument with your friends, say sorry first.

★Remember never to leave old friends just because you have made some new ones.

★Listen to others carefully. It’s better to be a good listener.

★Be different. Don’t try to change others through your own ideas.

Warnings:

★Never ask or give away(泄密) a friend’s secret.

★Don’t be afraid to stand up for what is right.

★You’d better not give your ID number, phone number or your home address to people that you have just made friends with.

根据短文内容,从题中所给的A、B、C、D四个选项中,选择最佳答案。(10分)

小题1:Why is it good to look for groups in your area?

A.Because it isn’t far.

B.Because it is a rule in your area.

C.Because you can make some money.

D.Because it’s a good chance to meet people who have the same interests.小题2:The underlined word “contact” means “ ______ ”.

A.联系

B.关系

C.关联

D.联合小题3:If you are somebody’s good friend, you should ______ .

①try to know his or her secrets   

②support him or her when he or she is right

③keep in touch with them often  

④try to change her or him with your own ideas

A.①②

B.②③

C.②④

D.①④小题4:Which of the following is NOT right according to the passage?

A.Listen to your friends carefully and keep their secrets.

B.To keep in touch with your new friends, you’d better tell them your phone number or address.

C.If you have an argument with your good friend, you’d better say sorry to him or her first.

D.When you want to make more friends, you should look on the bright side first.小题5:What’s the best title for the passage?

A.What Is Real Friendship

B.Where to Meet New Friends

C.How to Make Friends

D.Friends should Help Each Other

填空题