【题目】

Imagine the situation. You are driving along a desert or on a mountain. You have no idea where you are. You passed the last house two hours ago. Then your car breaks down. It is night and it is cold. You have no mobile phone. What do you do? Well, next time take a GPS with you. This invention may be able to help you. It is a device (装置) which uses satellites (卫星) to find the user’s position (位置). It can find your position to within 20 metres. A GPS cannot start your car, but at least you will know where you are.

GPS, which means Global Positioning System, is a small radio receiver. It looks like a mobile phone. It is sometimes put into a watch or a telephone. We also find GPS devices in cars, planes, or boats. Some of these devices have electronic maps, so you know where you are. For example, in a city they can tell you the name of the street.

There are three parts to the Global Positioning System. The first part is the receiver. You can hold it in your hand, or have it fixed into your car, plane, etc. The second part is a group of satellites orbiting(环绕运行) the Earth. The receiver contacts at least four of the satellites and calculates its position. The third part of the system is a network of ground stations. They are all over the world. They control the satellites and make sure they are working well.

Some people think that in the future the GPS will be as common as the mobile. They are becoming cheaper and more and more accurate. Also there will be new uses for the GPS. Perhaps they will become like watches. Everyone will have one and you will never be lost anywhere.

1GPS can help you find your position, can’t it?

2What does a GPS look like?

3How many things are mentioned that GPS devices can be put into?

4Why do some people think GPS devices will be popular in the future?

5What is the use of ground stations?

6What is the author’s purpose of writing this passage?

【题目】短文填空。

请用适当的词补充完成下面这篇短文,并将所缺单词填写在答题卡指定位置上。每个空只能填写一个形式正确、与短文意思相符的英语单词。

Today, an increasing number of people are always looking at their mobile phones with their heads down. These people are 【1】 the “Heads-down Tribe”. Heads-down tribe members now can be seen everywhere.

There are more and more traffic accidents 2 because more drivers use mobile phones while driving. In order to make drivers pay more 3 to driving, some new traffic rules have been made.

As we can see above, using mobile phones may 4 traffic accidents. Also, more and more interesting and strange facts happen to the “Heads-down Tribe”. A man in America kept using his mobile phone on 5 way home. As a 6 , he knocked into a big lost bear. When he lifted his eyes from the phone,he was so afraid 7 he turned around and ran away as 8 as possible. Another fact is that we can often see people in the restaurant eating face to face but looking at their own mobile phones. It’s strange that they don’t talk to the ones who sit opposite to them during the meal. Some of them even have 9 communicating with others on the phone.

Mobile phones are helpful and necessary tools for modern life. Whether they are good or not depends 【10 how people use them. Let’s be “healthy” users and try to be the “Heads-up Tribe”.

【题目】Butterflies at Risk

What's causing problems for these beautiful insects?

Something is harming the monarchs. One of the largest butterflies in North America, monarchs are famous for their long migrations(迁徙)covering thousands of miles. Yet the number of monarchs is dropping. Bad weather conditions, putting the butterfly population in danger. Some butterfly experts say that the number of monarch butterflies has been cut by 25 percent. In recent years, unusually cold temperatures and rain have caused monarchs to die in large numbers. These conditions have also caused new butterflies not to hatch(孵化).

Will they return?

Monarchs are very sensitive(敏感的)to change because of the long distances they travel. They cover thousands of miles each year, flying between their winter homes in Mexico or Southern California and their summer homes in the Midwest. Other animals also migrate. And many travel much farther. A bird called the Arctic tern goes round trip between the Arctic and the Antarctic every year. Like the Arctic tern, a type of gray whale has a long migration. It travels 12,400 miles from Baia California in Mexico to waters off Alaska and back. The longest migration ever recorded is by the sooty shearwater. Every year this bird flies 40, 000 miles from New Zealand to the northern part of the Pacific Ocean to find food.

The monarchs don't travel as far as animals like the Arctic tern and the sooty shearwater, but their journey isn't safe. Every year as many as 100 million monarch butterflies leave Mexico for the first leg of the migration. It's hard to imagine that such a large number might be in danger. Yet many scientists tell us that the danger is very real.

In Mexico people are destroying the natural environment. They cut down the trees where millions of monarchs. spend the winter and use chemicals to kill the milkweed, the monarch's favourite food. Monarchs spend the winter in Mexico and California. In both places, development is destroying these winter homes. Unless steps are taken to protect their habitats, the monarchs' migration could become a thing of the past.

"If we lose the whole migration, we lose one of the nation's most magnificent phenomena, " said Chip Taylor, a professor at the University of Kansas. These butterflies are the symbol of richness of biological diversity(生物多样性).

1Are monarch butterflies famous for their long migrations?

2What are putting the butterfly population in danger?

3Where are monarchs' winter homes?

4In Paragraph 2, what animal has the longest migration?

5What can people do to protect monarch butterflies?

 0  143558  143566  143572  143576  143582  143584  143588  143594  143596  143602  143608  143612  143614  143618  143624  143626  143632  143636  143638  143642  143644  143648  143650  143652  143653  143654  143656  143657  143658  143660  143662  143666  143668  143672  143674  143678  143684  143686  143692  143696  143698  143702  143708  143714  143716  143722  143726  143728  143734  143738  143744  143752  159627 

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网