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A、They eat or spoil crops. B、They destroy dams and buildings. C、They attack birds and animals. D、They carry diseases. D信息明示题,文章提
A、They eat or spoil crops. B、They destroy dams and buildings. C、They attack birds and animals. D、They carry diseases. D信息明示题,文章提
admin
2009-10-19
106
问题
Rats are the enemy of human beings. They eat or spoil crops of grain and rice before they can be harvested, or while they are in storage. In India, where millions of people go hungry, there are ten times as many rats as people. Rats devour half of the available food. Rats will also attack birds and animals, from frogs and chicks to geese and young calves. They have even destroyed dams and buildings by making holes through or under them, and have started fires by chewing on electrical wiring.
The most terrible destruction caused by rats, however, has come from the diseases they carry. In the fourteenth century, rats caused the death of one-third of the world’s population by transmitting the dreadful Black Plague that mined Europe.
Ironically, it is in fighting diseases that rats have been most useful to humanity. Thousands of specially bred rats are used in research laboratories every year to test medicines which can possibly be used to prolong and improve human life. Some laboratory rats are even used to test new methods of eliminating their cousins, the wild rats.
选项
A、They eat or spoil crops.
B、They destroy dams and buildings.
C、They attack birds and animals.
D、They carry diseases.
答案
D
解析
信息明示题,文章提到The most terrible destruction caused by rats... has come from the diseases they carry,即老鼠带来最可怕的危害是它们传播疾病,故选D
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0
大学英语四级
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