Question

 

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 (裝置) which uses satellites (衛(wèi)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(環(huán)繞…運(yùn)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.

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

2.What does a GPS look like?

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

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

5.What is the use of ground stations?

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

 

Answer 1

【答案】

1.Yes, it can.

2.It looks like a mobile phone.

3.Five

4.They are becoming cheaper and more accurate and there will be new uses.

5.They control the satellites and make sure they are working well

6.To give us the introduction of the GPS./To introduce GPS devices to people.

【解析】

試題分析：這篇短文主要講述了GPS是一個(gè)設(shè)備，能使用衛(wèi)星找到用戶的位置。GPS是一個(gè)小型無線電接收機(jī)，它看起來像一個(gè)手機(jī)。我們還發(fā)現(xiàn)在汽車、飛機(jī)或船只中有GPS設(shè)備。其中一些設(shè)備有電子地圖,所以知道你在哪里。

1.細(xì)節(jié)理解題。根據(jù)短文第一段It can find your position to within 20 metres. A GPS cannot start your car, but at least you will know where you are.描述，可知GPS至少知道你在哪。

2.細(xì)節(jié)理解題。根據(jù)第二段It looks like a mobile phone.描述，GPS看起來像手機(jī)。

3.細(xì)節(jié)理解題。根據(jù)第二段可以判斷。It is sometimes put into a watch or a telephone. We also find GPS devices in cars, planes, or boats.　�。� watch、a telephone、cars、planes、or boats可知是五個(gè)

4.細(xì)節(jié)理解題。根據(jù)最后一段，They are becoming cheaper and more and more accurate. Also there will be new uses for the GPS.它們將變得更便宜，更準(zhǔn)確。也會(huì)有新的用途。

【小題５】細(xì)節(jié)理解題。根據(jù)第三段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.第三部分的系統(tǒng)是一個(gè)網(wǎng)絡(luò)的地面站，他們?cè)谑澜绺鞯�，他們控制的衛(wèi)星和確保他們工作得很好。

【小題６】推理判斷題。全文介紹GPS，所以作者寫這篇文的目的是給我們介紹GPS設(shè)備。

考點(diǎn)：科普環(huán)保類閱讀短文。