题目内容
In the most southern part of our planet, there’s a place that’s covered with snow and ice all year round. But it has the clearest and cleanest air. Amazingly, in this place, the sun sometimes hangs even in the midnight sky. This place is Antarctica (南极洲): the coldest, windiest and harshest (恶劣的) place on the Earth.
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As the world’s least-known place, Antarctica is of great interest to scientists around the world. In 1983, China joined the Antarctic Treaty (《南极条约》). The treaty made Antarctica a peaceful place for member countries to do scientific research. During 30 years, China has sent many scientists to Antarctica. They mostly look at the resources under the icy land and do research about climate change and marine (海洋的) biology.
Antarctica is a place with fantastic views. However, life there is very hard. Food is one of the biggest problems. Frozen (速冻) food which can be heated easily is people’s daily food. Fresh vegetables are hard to grow in the cold weather. Therefore, scientists often eat dried or canned vegetables.
Sleep is also troublesome. In Antarctica, summer lasts from November to March. During this period, Antarctica points to the sun and receives sunlight 24 hours a day. In order to get some sleep, scientists cover the windows with black plastic cloth to create “night”.
Working in Antarctica is dangerous, especially when meeting gale-force (七级以上的) winds. Sometimes the wind is even stronger than a typhoon. It can easily blow people away. So there are ropes that connect buildings of some research stations. People can hold these ropes to keep their balance in forceful winds.
What’s more, communicating with others is difficult. Without cables and Internet in some research stations, two-way radios are the only tools to communicate. If people want to say hello to friends and relatives, they can use satellite phones.
Although it is challenging to work in Antarctica, scientists’ passion to learn about this mysterious land will never end. It is hopeful that one day they will step every corner of this icy land.
1.From Paragraph 1, we learn that the Antarctica ______.
A. is covered with snow and ice
B. rains heavily from time to time
C. has little wind most of the time
D. has sunshine during every night
2.Scientists from China go to Antarctica to _____.
A. find out ways to control water pollution
B. research climate change and marine biology
C. grow plants and vegetables in special condition
D. stop the hunters from killing the marine biology
3.In order to sleep well in Antarctica, the scientists have to _____.
A. wear more clothes to keep warm
B. cover the windows with black cloth
C. connect research stations with ropes
D. eat more fried and canned vegetables
4.We can replace (替换) the underlined word passion in the last paragraph with .
A. strong love
B. full preparation
C. pleasant introduction
D. amazing imagination
5.The passage is mainly about .
A. view of the Antarctica
B. exploring the Antarctica
C. how to survive in the Antarctica
D. climate changes of the Antarctica
1.A
2.B
3.B
4.A
5.B
【解析】
试题分析:这篇短文主要介绍了科学家们对南极洲充满了兴趣。虽然有食物,交流,睡眠等问题但科学家们了解这块神秘土地的激情永远不会结束。
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考点:科普类短文阅读。
Computers can injure(伤害)you. Most other injuries happen suddenly.For example,if you fall off a bike and break your arms, it happens very quickly. But computer injuries happen slowly.
You probably know how to ride a bike safely. Now learn to use a computer safely.
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Your eyes
Too much light can injure your eyes, so never sit too close to a computer screen. Your eyes should be more than 50 centimeters from the screen. Don’t forget to look away from it sometimes. This gives your eyes a rest.
When you use a comput
er, the window should be on your left or your right. If it is behind you, the light will reflect on(反射)the screen. If the window is in front of you,the sun and the screen will both shine into your eyes.
Your hands and wrists(手腕)
Hand and wrist injuries can happen because the hands and wrists are moved in the same way hundreds of times. If you use a keyboard for a long time, follow these three rules: 1) Rest your wrists on something.
2) Keep your elbows(肘)as high as the keyboard.
3) Stop sometimes and exercise your hands, wrists and fingers in a different way.
Your back
Some people sit for many hours in front of a computer. If you sit in the wrong way, you can injure your back or your neck. So you shouldn’t bend your back when you sit. The top part of the screen should be in front of your eyes. Your forearms, wrists, hands and the upper part of your legs should all be parallel(平行)to the floor. If you are sitting for a long time, get up every half an hour and exercise your arms, legs and neck.
Enjoy your computer, but use it safely.
Title: How to use a computer safely | ||
Different 1. of your body | Causes of the injuries | Some 2. of keeping you away from computer injuries |
Your eyes | ◆Too much light can injure your eyes | ◆Don’t sit too close to a computer screen. ◆Your eyes should be 3. 50 centimeters from the screen. ◆ 4. to look away from the screen sometimes. |
Your 5. and wrists
| ◆You 6. them in the same way hundreds of times. ◆You use a keyboard for a long time. | ◆7. your wrists on something. ◆Keep your elbows at the same 8. as the keyboard. ◆Exercise your hands, wrists and fingers in different ways. |
Your back
| ◆You sit for many hours 9. a computer. ◆ You sit in the wrong way. | ◆You should keep your back 10. when you sit. ◆Get up every half an hour if you are sitting for a long time. |