网址：http://m.1010jiajiao.com/timu3_id_2767958[举报]
根据短文内容及所给首字母提示写出所缺单词，使短文内容完整。
Overhead bridges can be seen in many parts of Singapore. Overhead bridges are in the places where traffic is very heavy and c____【小题1】___the road is not safe. These bridges can help people cross roads safely．Overhead bridges are u____【小题2】___ in very much the same way as zebra crossings．They are more efficient（效率高的），though l____【小题3】____convenient（方便的）because people have to climb up a lot of s____【小题4】____. This is inconvenient to the old．When people use an overhead bridge，they do not hold up traffic．But when they cross a busy road using a zebra crossing，traffic is held up．This is w___【小题5】__ the government has built many overhead bridges to help people and k __【小题6】____ traffic moving at the same time. The government of Singapore has saved a lot of m____【小题7】____ to build these bridges．For their own safety，people should use them i____【小题8】__of rushing across the road．Old people may find it a little difficult, but it is much safer than walking across the road with all the moving t_____【小题9】__．Overhead bridges are very useful. People, both old and young, should always use them．This will stop accidents from h ___【小题10】__．Are there any overhead bridges in your city? 查看习题详情和答案>>
Put 2 February in your diary! It is World Wetlands Day! It marks the date that the
Convention(公约) on Wetlands was signed(签署)in1971.This special day was first celebrated in 1997 and it is celebrated every year.
The celebration is a call for action. It is a way to show people how important and
useful the wetlands are for people. On World Wetlands Day, people around the world take
part in many wetlands activities. People take trips to the local wetlands. There are talks
about how important the wetlands are. People get together to clean up their local wetlands
Children draw pictures to advertise the day. People also compete(比赛)in boat races.
The World Wetlands Day is important! If there are no wetlands, there will be no water for anyone in the future. Wetlands help protect nature and resources(资源)like fresh water. Already, more than 10000 million people in the world do not have fresh water.
Many people do not know how important the wetlands are. They can understand why an
elephant or a tiger is important because they are big, beautiful animals. It is much harder for
them to understand how important the animals in the wetlands are. These small animals,
such as frogs and snails, play a very important part in keeping the balance of nature.
All plants and animals are part of the food chain(链).If the small wetlands animals
die, some animals in the food chain will have nothing to eat. They will also die. People
need the wetlands to keep the balance of nature in the world. If we do not protect nature
today，it will be gone tomorrow.
46. What should you put in your diary?
A. Some frogs.
B. The date of World Wetlands Day.
C. 1971
D. Any special day.
47. Where do people celebrate World Wetlands Day?
A. All over the world. B. In ships
C. At home. D. In their own way.
48. Which of the following sentences is NOT true?
A. People celebrate World Wetlands Day by taking part in competitions.
B. People celebrate World Wetlands Day by taking hips to local wetlands.
C. People celebrate World Wetlands Day by listening to talks about the wetlands.
D. People celebrate World Wetlands Day by talking about the weather.
49. Why are small animals important?
A. They are part of the balance of nature and the food chain.
B. They are beautiful.
C. Bigger animals are eaten by them
D. Without them, there may be no water.
50. Which of the following might be the best title of the article?
A. Wetlands Are Important
B. Small Animals Are Also Important
C. World Wetlands Day
D. Food Chain
查看习题详情和答案>>
Our nearest neighbor is the moon. In the sky, the moon and the sun seem to be of the same size because the moon is much nearer.
The moon makes the tides—the changes in the level of the sea. The moon and the sun together pull the sea. In some parts of the world, the difference between * high tide' (when the sea is very near to the land) and ' low tide' (when the sea is far away from the land) is very big. This is very important for ships.
The moon is very different from the Earth. Gravity on the moon is six times weaker than that on the Earth. There isn't any air. During the day, it is very, very hot but at night it is very, very cold. Nothing can live on the moon.
If the moon goes between the Earth and the sun, we have an eclipse of the sun(日食) . The moon stops the light from the sun and we have night in the day.
If the Earth goes between the moon and the sun, we have an eclipse of the moon. The moon goes into the shadow( 影子) of the Earth and it disappears for a few minutes.
1. The sun to the Earth is _________times farther than the moon to the Earth.
A. nearly 200 B. less than 300 C. nearly 400 D. more than 400
2.When the moon goes between the Earth and the sun, we have night in the day, we call it the eclipse of
A. the moon B. the sun C. the stars D. the Earth
3. Which of the following happens when we have an eclipse of the moon?
A. The Earth goes between the moon and the sun.
B. The moon goes into the shadow of the sun.
C. The moon goes into the shadow of its own.
D. The sun disappears for a few minutes.
4.Which of the following statements are TRUE?
a. The moon and the sun are of the same size.
b. Gravity on the Earth is 6 times stronger than that on the moon.
c. The changes in the level of the sea are called tides.
d. The moon itself pulls the sea and makes the tides.
e. When the sea is near to the land, a high tide may happen.
f. It is much hotter in the day but much colder at night on the moon.
A. a. b. c. f. B. b. c. d. e C. a. d. e. f D. b. c. e. f
查看习题详情和答案>>
The earth moves round the sun ,and the moon goes round the earth .When our part（部分）of the earth turns to the sun ,it is day ,When our part of the earth turns away from the sun ,it is night. The sun is much bigger than the moon .But sometimes the moon looks bigger than the sun, because it's much nearer to the earth. The sun is very bright .It gives a very strong light .The moon looks quite bright, too .But it doesn't give any light at all. The moon looks much bigger and brighter than the stars .But actually（事实上）, the stars are much bigger and brighter than the moon .They look smaller than the moon because they're much farther away from us.
【小题1】Sometimes the moon looks bigger than the sun, because______.
| A．it is much bigger than the sun |
| B．it comes out only at night |
| C．it is much nearer to the earth than the sun |
| D．it doesn't give a very strong light |
| A．look much bigger than the sun |
| B．look much brighter than the moon |
| C．are a lot brighter than the moon, but they are not bigger than the moon |
| D．are much farther away from us than the moon |
| A．our part of the earth turns to（转到）the moon |
| B．the sun looks much smaller than the stars |
| C．we can't see any stars in the sky. |
| D．the moon turns away from the sun |
Big schoolbags have been a big problem for students for a long time. Maybe your schoolbag is too 31 to carry, and it troubles you a lot 32you want to find out a book to read. Now e -textbooks will 33you.
It is said that many Chinese middle schools are going to use e - textbooks. An e - textbook, in fact, is a small 34for students. It is much lighter than a usual schoolbag and 35to carry. Though it is as 36 as a book, it can hold (容纳) everything for study. The students can read the text page by page on the 37 , take notes 38the pointer (屏写笔) ,or even "hand in" their 39to their teachers by sending e - mails. All they have to do is to press a button ( 按开关).
Some people say e- textbooks are good, but some say they may be40for the students' eyes. What do you think of it.?
1.A. expensive B. heavy C. light
2.A. till B. after C. when
3.A. trouble B. help C. solve
4.A. TV B. radio C. computer
5.A. easy B. difficult C. hard
6.A. smaller B. small C. harmful
7.A. paper B. keyboard C. screen
8.A. with B. in C. by
9.A. computer B. homework C. e - textbooks
10.A. bad B. dangerous C. good
查看习题详情和答案>>