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Rivers are one of our most important nat...

Rivers are one of our most important natural resources. Many of the world’s great cities are located on rivers, and almost every country has at least one river flowing through it that plays an important part in the lives of its people.

Since the beginning of history, people have used rivers for transportation. The longest one in the United States is the Mississippi. The lifeline of Egypt is the Nile. To the people of India , the Ganges is great, but it is also important for transportation; ships can travel along it for a thousand miles. Other great rivers are the Congo in Africa and the Mekong in southeast Asia, The greatest of all for navigation(航海), however, is the Amazon in Brail, It is so wide and so deep that large ships can go about two thousand miles upon it.

Besides transportation, rivers give food, water to drink, water for crops, and chances for fun and recreation for the people who live along their banks. In order to increase the supply of water for crops, engineers sometimes build a dam across a river and let a lake form behind the dam. Then people can use the water not only to irrigate their fields but also to make electricity for their homes and industries.

However, large cities and industries that are located upon rivers often make problems. As the cities grow in size and industries increase in number, the water in the rivers becomes polluted with chemicals and other materials. People are learning the importance, however, of doing more to keep their rivers clean if they want to enjoy the benefits of this natural resource.

1.The greatest river for navigation is        .

Athe Amazon       Bthe Nile

Cthe Mekong       Dthe Mississippi

2.Which is wrong according to the passage?

AThe Nile is an important river in India.

BAlmost every country has at least one important river.

CMany cities are located on rivers.

DRivers play an important part in the lives of people.

3.From a dam, people can use the water for        .

Akeeping the rivers clean

Bonly making electricity

Cwashing clothes

Dirrigation and making electricity

4.The water in the river is polluted because of        .

Apeople’s drinking water too much

Bpeople’s swimming in the river too much

Cchemicals and other materials

Dpeople’s building a dam across a river

5.The main idea of the passage is about        .

ARivers in cities     BThe importance of rivers

CTransportation       DNatural resources

 

1.A 2.A 3.D 4.C 5.B 【解析】 试题分析:全文讲述了河流的用途和重要性。 1.根据第二段The greatest of all for navigation(航海), however, is the Amazon in Brail,得知最大的航海海域是巴西的亚马逊河流。选A。 2.The lifeline of Egypt is the Nile. 得知尼罗河在埃及。因此A项中说尼罗河在印度是错误的。选A。 3.根据第三段Then people can use the water not only to irrigate their fields but also to make electricity for their homes and industries.得知人们可以用大坝的水来灌溉田地和家庭与工业发电。选D。 4.最后一段the water in the rivers becomes polluted with chemicals and other materials.得知水被化工产品和材料污染。选C。 5.主旨大意题。全文在讲述河流的用途和重要性。选B。 考点:科普类文章
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