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Water is needed everywhere．There is water in seas；rivers and lakes ,Water is found almost everywhere．Even in the driest part of the world．there is some water in the air．You cannot see or feel it when it is a part of the air．The water in the seas，rivers and lakes is a liquid。The water in the air is a gas，and we call it water vapor．
Clouds are made of water．They may be made of very small drops of water．They may also be made of snow crystals(结晶体)．Snow crystals are very，very small crystals of ice．Ice is frozen water．It is a solid．There can be snow and ice everywhere in winter．
( )4．Where Can we find water?
A．We can find water when it turns into vapor．
B．Water can be found almost everywhere
C．We can see water in deserts here and there．
D．Water is only in seas and rivers．
( )5．We must protect water resources because ．
A．crops need water B．all living things need water
C．all animals need water D．all plants need water 查看习题详情和答案>>
【小题1】I saw an alien get out of the UFO. Isn't that a________.
【小题2】The old men should be spoken to p________.
【小题3】——Shall we meet on W_______ or Thursday?——Either day is OK with me.
【小题4】I don't remember w________ I have left my keys at home or in the car.
【小题5】Don’t tell anybody. It’s just b________ you and me.
【小题6】Many young people like to study a________, such as in Britain or in the USA.
【小题7】Keep s________ and have a happier, healthier and better life.
【小题8】S_________ across the Pacific Ocean when it is possible. This is what your parents said.
【小题9】When I got to the school, I r________ I had made a mistake that I had left my homework at home.
【小题10】I think as teenagers, we should be allowed to make d________ for ourselves. 查看习题详情和答案>>
配对阅读。下面左栏是人们在日常生活中浪费能源的5种现象，右栏是与其对应的解决建议，请选出一个最佳答案，并将答题卷上对应题目所选的选项涂黑。选项中有一项是多余的。
| 【小题1】Every day in homes all over the world, people have lights on when no one is in room. 【小题2】Air conditioners are usually set at too high temperatures in winter. 【小题3】A lot of water is wasted by using too much. 【小题4】We’ll have less and less gas to use. Because more and more people buy cars. 【小题5】People especially children watch TV for too many hours. | Take a shower instead of bath, for a bath uses twice as much water. Don’t flush(冲洗) toilet unnecessarily. Plant more trees and grass around our houses. Encourage people to do more outdoor activities in their free time. Get children to learn more from reading books. Always keep the saying in mind “ Turn off lights before leaving.” We should walk to work, ride a bike to school, take a bus home more often instead of driving cars. In room where you have an air conditioner, you can save electricity by cleaning the filter. A filter uses 30 percent more energy when it is dirty. Also, set the air conditioner at 25℃. |
Air is all round us．It is around us___31____we walk and play．From the time we are born，air is around us on every side．When we sit down，it is around us．When we go to bed．air is 32 around us．We live 33 air．
All living things 34 air．Living things cannot live 35 air．We can live without any water for 36 days，but we cannot live for more 37 a few minutes without air．When we are working 38 running，we need more air．When we are asleep，we need less air
We live in air but we cannot see it．We can only feel it．We can feel it when it is 39 ． Moving air 40 wind．
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根据下列句子及所给单词的首字母，写出各单词的完全形式（每空限填一词）。
【小题1】I saw an alien get out of the UFO. Isn’t that a________.
【小题2】The old men should be spoken to p________.
【小题3】——Shall we meet on W_______ or Thursday?——Either day is OK with me.
【小题4】I don’t remember w________ I have left my keys at home or in the car.
【小题5】Don’t tell anybody. It’s just b________ you and me.
【小题6】Many young people like to study a________, such as in Britain or in the USA.
【小题7】Keep s________ and have a happier, healthier and better life.
【小题8】S_________ across the Pacific Ocean when it is possible. This is what your parents said.
【小题9】When I got to the school, I r________ I had made a mistake that I had left my homework at home.
【小题10】I think as teenagers, we should be allowed to make d________ for ourselves.