When the weather is hot, you go to a lake or an ocean. When you are nears lake or an ocean, you feel cool. Why? The sun makes the ear& hot, but it cannot make the water very hot. Although the air over the earth becomes hot, the air over the water keeps cool. The hot air over the earth goes up. Then the cool air over the water moves in and takes the place of the hot air. When you are near a lake or an ocean, you feel the cool air. When it moves in, you feel the wind. And the wind makes you cool. Of course, scientists cannot answer all of our questions, ff you ask, "Why is the ocean full of salt?", scientists will say that the salt comes from rocks. When a rock gets very hot or very cold, it cracks (裂開). Rain falls into the cracks .The rain then carries the salt into the earth and into the rivers. The rivers carry the salt into the ocean. But then we ask, "What happens to the salt in the ocean?" The ocean does not get more salty every year. Scientists are not sure about the answer to the question. We know a lot　about our world. But there are still many answers that we don't have, and we are curious(好奇的).

1. Now scientists know_______

A. what makes people feel cool near a lake or an ocean in summer

B. everything about the ocean

C. why the ocean doesn't get more salty

D. what happens to the salt in the ocean

2. In this passage the word "cracks" means _______in Chinese.

A. 山谷       B.裂縫       C. 地殼     D. 巖漿

3. Which of the following is not true?

  A. The sun makes the earth hot.

  B. The sun cannot make the water very hot.

  C. The wind makes you tout.

  D. The hot air over the water moves in and takes the place of the cold air

4. People are always curious about the world because______

A. they know nothing about it      

B. they know little about it

C. there are many answers they do not have     

D. both. A and B

5. The main idea of this passage is that ______

A. the salt in the ocean comes from rocks

B. scientists can explain (解釋) everything we want to know

C. people feel cool when they are near a lake or an ocean

D. scientists can explain many things, but not everything

練習冊系列答案
相關(guān)習題

科目：初中英語 來源：1+1輕巧奪冠·優(yōu)化訓(xùn)練　八年級英語(下) 題型：026

根據(jù)句意和提示寫單詞

What should you say when the w________(女服務(wù)員)brings you the wrong food?

查看答案和解析>>

科目：初中英語 來源：1＋1輕巧奪冠優(yōu)化訓(xùn)練（八年級英語）（下） 題型：026

根據(jù)句意和提示寫單詞

What should you say when the w________（女服務(wù)員） brings you the wrong food?

查看答案和解析>>

科目：初中英語 來源：2012-2013學年浙江建德李家鎮(zhèn)初級中學初二下期期中考試英語卷（帶解析） 題型：單詞拼寫

根據(jù)下列句子及所給單詞的首字母，在答題卷上按題號寫出各單詞的完全形式（每空限填一詞）。
【小題1】My grandfather likes to water the f______ in the garden on weekends.
【小題2】The boy is too young. So don’t leave him a______ at home.
【小題3】If I don’t help my mom do some h______ on weekends, my mother will be very angry with me.
【小題4】Last night I didn’t go to bed u______ the TV program was over.
【小題5】Last Sunday I w______ a letter to my father.
【小題6】I need to look smart for my job i______.
【小題7】He f______ his test last week. He should study hard.
【小題8】He m______ his teacher in the street yesterday.
【小題9】When the little girl saw the big tiger, she felt very s______.
【小題10】Last week, I p______ 500 yuan for my new bike.

查看答案和解析>>

科目：初中英語 來源：2011-2012學年江蘇省啟東市初三下學期抽測英語試卷 題型：單詞拼寫

請認真閱讀下面短文，并根據(jù)各題所給首字母的提示，寫出一個合適的英語單詞完整、正確的形式，使短文通順。

You’re standing with your classmates. E  66 ___  is talking except you. Perhaps you’re afraid they will laugh at when you say. Maybe you just aren’t b  67  enough to speak. Shyness is like a snake that crawls（爬進）into our mouth and s  68  us speaking. But we shouldn’t let it stay there.

I am 29 years old. Even today, that snake still sometimes v  69  me. When I was in high school, I was so shy that I wouldn’t talk to anyone except my parents and best friends. If a stranger asked me the w  70  to a local shop, it was as if I’d forgotten how to talk. One summer, I got a j  71  in a restaurant and that helped a lot. It meant I had to talk to customers（顧客）. I had to tell them how m  72 their meal cost. I had to ask them if they want to drink Coke or Sprite.

This job taught me how to speak with people. You may be too young to find a part-time job. But you can look for other c  73  to speak with people. You can offer to help an old woman carry her heavy bag. O  74  you can go to get a newspaper for your family. If you do these things for a while, the ‘shyness’ snake will soon begin to l  75  you alone. It’ll look for another mouth to crawl into.

 

查看答案和解析>>

科目：初中英語 來源：2012屆度江蘇省鹽城市九年級第一學期期中考試英語卷 題型：單詞拼寫

1. When you come to Yancheng, you can enjoy the BRT(快速公交). It’s ________ (舒適) and fast. How fast our city is developing!

2. Many people don’t want to live in Tokyo(東京) because of the Nuclear(核) _________ (污染).

3. This  his ______ (九) year in Sheyang. He loves living here. He loves everything here.

4. We are looking forward to his __________ (到達). He is a famous singer.

5. China’s __________ (人口) is becoming aging (老齡化的). We must take action to prevent it.

6. —What’s the w__________ like today?   —The radio says it’s sunny.

7. If you read more, you will get more k__________. Do you believe it?

8. Boys like watching ball games very much, e__________ the NBA. Those basketball players are really wonderful.

9. When you go for a picnic, remember “S_______ is first. Keep away from the dangerous places. ”

10. Everyone must know the i__________ of learning English. It’s used the most widely in the world now.

11. Many __________ (mouse) destroyed the crops near the village. The farmers were   catching them everywhere.

12. He is __________ (true) sorry that he failed to pass the exam. But I don’t believe him, and you?

13. Millie doesn’t dance as __________ (beautiful) as her sister. She hasn’t practice it for a long time.

14. I would like Liu Qian to teach _________ (we) how to play magic. We admire him very much. He is my hero.       

15. Juan Antonio Samaranch(薩馬蘭奇)’s __________ (die) was a great loss to the whole world. People loved him very much all over the world.

 

查看答案和解析>>

同步練習冊答案