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Dust storms are Beijing again. The people of Beijing are wearing masks to protect their mouths and noses. The dust storms are a problem for the people of Beijing. For several years. The storms have made being outdoors dangerous. Why do the sandstorms hit Beijing and How do we solve the problem?
The sand and dust are a problem whenever the wind comes from the north.. ①When the wind is________, it dust and sand from the desert to north-west China.②Often the sandstorms are so bad that drivers have to be careful and use their headlamps to help them see what’s in front of them.
The Central Meteorological Station(中央气象台)says that sandstorms are a problem in summer because the land is drier. This means that the earth does not stick to the ground and the wind carries more sand and dust. When there is more rain, this does not happen, but this area is one of the driest places in the country. Dust storms also affect(影响)other areas like central and northern parts of China. Gansu and Shanxi provinces are also affected.
Sandstorms are a difficult problem because of people’s carelessness with the trees and grasslands. People are cutting down too many trees and raising too many sheep or cows on grasslands．So many grasslands and farmland become desert(沙漠)or sand. One way to solve the problem is to plant trees to hold earth to the ground. This will also bring more rain because plants help make the world’s rain. So, solving the problem needs a long-term plan. Today, the people of northern China have to protect themselves from the effects of this unpleasant natural disaster．
76. 在①处填上适当词使文章完整。___________ ___________
77. 将②处译成汉语。
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78. What’s the reason to make many farmlands and grasslands become desert?
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79. 找出与下列句子意思相同的句子。
Other areas like central and northern parts of China are also affected by the sandstorms.
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80. 找出本文的主题句。
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is made of a number of different plates(极块). For example, at San Francisco the
Pacific Plate which is moving towards the northwest meets the North American
Plate. The Pacific Plate is moving very slowly-at 5. 3 centimetres a year.
Sometimes these two plates stop and do not move for years. Then suddenly, they
jump and an earthquake is felt. As the movement of these plates,West America
near the sea has always been a bad place for earthquakes. When the 1906
earthquake happened, the Pacific Plate jumped 5-6 metres to the north.
We cannot stop earthquakes, but we can do things to make sure they don't
destroy(毁坏) the whole of cities. First,it is not a good idea to build houses
along the lines, where two of the earth's plates join together.Second, if you think
there may be an earthquake, it is better to build houses on rock not on sand.
Third, you must make the houses as strong as possible. Weak buildings will fall
down in an earthquake,but strong ones may stay up.
B. the inside of the earth is made of different plates
C. the outside of the earth is made of lots of different plates
D. the earth is a plate
B. when one plate pulls another plate
C. when one plate jumps over another plate
D. when two plates don't move
Plate
B. San Francisco stands near the Pacific
C. San Francisco is near the sea
D. the city of San Francisco wasn't built very well
B. earthquakes
C. building houses along the earthquake line
D. building weak houses at San Francisco
B. should build houses on rock not on sand if we think there may be an
earthquake
C. must make the houses as strong as possible
D. A, B and C
interesting experiment that can make something disappear, when one eye is open.
Make a card about the size of a postcard and write two English letters L and R
on it, L on the left and R on the right. First, hold the card about 80 cm away and
you see both the letters. Then close your right eye and look at the letter R only
with your left eye. And now, as you move the card slowly towards you, you'll
find the letter L disappearing. But if you move the card nearer to your face, the
letter will be seen again. Now do the same experiment with your left eye closed,
you'll find the letter R disappearing.
Why does the letter disappear? It is because there is a blind spot on the eye.
When the image (影像) of the letter falls on the blind spot, it won’t be seen. That
is why either of the letters disappears.
B. no one knows
C. most people know
D. all the people know
B. 消散
C. 盲点
D. 遗失
B. its image falls on the blind spot
C. you move it close to your eye
D. your left eye is not open
①Hold the card ②Move the card nearer ③Close your right eye
④Write two English letters ⑤Look at the letter R ⑥Make a card
B. ①③⑥④⑤②
C. ⑥①④③②⑤
D. ⑥④①③⑤②
B. an interesting experiment
C. where the blind spot is
D. there is blind spot on the eye
memory. It lasts less than 30 seconds. However, you don't look in the phone book for a friend's number. You know it. This is a long-term memory. Your long-term memory has everything that you remember.
Why do you forget something? Because you do not learn it in the beginning.This is the main reason
for forgetting. For example, you meet some new people, and you forget their names.You hear the name,
but you do not learn them. Then you forget them.
B. Less than thirty seconds.
C. Sixty seconds.
D. For a day or two.
B. We don't learn what we hear or see.
C. We do not hear or see what we learn.
D. We are ill sometimes.
B. It has a listing of friend's names.
C. You use it when you want to find a phone number you don't know.
D. You use it to buy a phone.
B. Learn them.
C. Just ask them their names again.
D. Spell their names again and again.
B. try our best to learn
C. depend on our short-term memory
D. catch our long-term memory
e Half-Blood Prince is warmly welcomed by the children in China. It sells well across China. You can see and
hear the advertisements about the book here and there.
Why is the book so attractive to children? After reading it, I was attracted
by the magic world. I can not help asking: where is our own Harry Potter?
China has a long history and colorful culture. With a large market of
teenagers, China published (出版) many popular books among children.
However, why are the present books not as good as those foreign ones?
Firstly, quite a number of children's books are focused on teaching, and they
have little interest value. Reading them, children often have a feeling of being "educated".Certainly, they don't like them. Secondly, fewer children like the
same stories, but most Chinese books are usually much the same. One knows the
ending as early as in the beginning. Finally, the writers seldom think about
children's needs.
First-class Reading for children should be interesting, and written in their
language.
B. Our writers seldom know children’s needs.
C. Most of them are the same.
D. They are better than foreign ones.
B. it can lead children into a wonderful world
C. it's not written in children's language
D. it's advertised more often on TV or posters
B. low level
C. really good
D. extra difficult
B. Chinese parents should buy Harry Potter for their children
C. our children should learn from Harry Potter
D. Chinese writers should write better books for children
B. our children need another magic boy
C. ways to choose books
D. our children need more better books