问题 选择题

物质是由各种微观粒子构成的。下面事实能说明粒子在不停运动的是  )

A.盐咸糖甜

B.热胀冷缩

C.美酒飘香

D.H2O2和H2O性质不同

答案

答案:C

A、盐咸糖甜说明不同物质的粒子性质不同.

B、热胀冷缩是因为粒子间的间隔受热时增大,遇冷时缩小的缘故.

C、美酒飘香是因为美酒中含有的分子不断运动,向四周扩散,使人们闻到酒的香气.

D、H2O2和H2O是两种不同的物质,H2O2和H2O分子的构成不同,H2O2和H2O的性质不同.

故选C.

完形填空

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。注意:请将答案转写到答题卡上,写在本试卷上无效。

Most of us trade money for entertainment.  71 But if you think you can’t have a good time

without spending lots of money, read on. You can find some new discoveries.

Remember one sentence: the best things in nature are free. If you have the eyes to find fun

around you, though you have no money, you can have a great time!

  72 Stroll through busy streets and see what everybody else is doing. You will probably see

people from all over the world; you will certainly see people of every age, size, and shape, and you

will get a free fashion show, too.

Check the listings in your neighborhood newspaper. Local colleges or schools often welcome the public to hear an interesting speech or a good debate.   73 Be sure to check commercial advertisements in the newspapers, too. A flea market can provide hours of pleasant browsing. Perhaps you can find a free cooking or crafts demonstration in a department store.

  74 It is always more pleasant not to have people in front of you in a museum or at a zoo. You may save some money, too, for these places often set aside one or two free admission days at slow times.

Pretend that you are a tourist traveling in this city from time to time, and get to know your city all over again including the sights that people travel miles to see.  75 

Just have a relaxed mind, and you will find entertainment no matter you have money or not.

A.However, money is not highly valued everywhere.

B.The film or concert series at the local public library probably will not cost you a penny.

C.It seems that nowadays we can only use money to enjoy ourselves.

D.Plan ahead for some activities. E.It won’t cost much ready money, either.

F.With imagination and a spirit of adventure, you can easily find good entertainment at no cost at all.

G.People may be the most interesting show in a large city.

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