问题 选择题

下列表示的是物理现象与其在生活中实例的联系,其中不正确的是(  )

A.分子运动现象--金秋八月,公园里桂花飘香

B.压强现象--汽车轮胎外刻有花纹

C.物体受浮力现象--气球脱手后升空

D.大气压强现象--抽水机抽水

答案

A、物质是由分子组成的,桂花中的芳香类物质不停地做无规则运动充满周围的空气,所以公园里桂花飘香,故A正确;

B、汽车轮胎外刻有花纹是通过增大接触面的粗糙程度而增大压强,故B错误;

C、气球受到向上的浮力大于气球的重力,气球脱手后升空,故C正确;

D、水在大气压力作用下被压到高处,抽水机抽水利用了大气压,故D正确;

本题选错误的,故选B.

完形填空

第二卷(非选择题,共35分)

第一节: 对话填空(共10小题;每小题1分,满分10分)

D—David,   T---Tony

D: Hi, Tony. Are you reading something exciting?

T: Oh, nothing much. I’m just reading some science (76) f__. David,    76._______

it’s a long time since I saw you last and I could hardly

(77) r___ you because you’ve changed so much.                    77_______

D: Oh, I’ve just had a (78) h____ in the barber’s and I am wearing       78_______

a pair of glasses now.

T: No wonder. By the way, what’s your plan for this weekend?

D: We are going to have a picnic in the countryside on Saturday.

Do you wan to join us?

T: I’d like to, but I’m afraid I can’t as I’ ve got (79) p___of work to       79______

do recently.

D: I know you are always as (80) b___as a bee.But don’t forget          80______

that no matter how much work you have to do, you should try

to (81) s___ aside some time for a rest. Health must come first,         81_____

after all.

T: Yes, you are right. I’ll go with you. And why not ask Sam to

go with us together? He can (82) b___ us a lot of fun.                 82_____

D: That’s a good idea, but not this time, for his parents

(83) d____ two days ago and he is very upset now. Maybe              83_____

he doesn’t want to go with us.

T: Really? I simply can’t (84) b____my ears.                        84____

D: Yes, I’m surprised to know that their marriage has broken up ,too.

T: I think he needs to stay(85) a_____and calm himself down.          85____

D: Yes.

单项选择题