问题 单项选择题 A型题

下列细菌容易对青霉素产生耐药性的是()

A.溶血性链球菌

B.脑膜炎球菌

C.肺炎球菌

D.金黄色葡萄球菌

E.草绿色链球菌

答案

参考答案:D

解析:青霉素对溶血性链球菌、肺炎球菌、草绿色链球菌和脑膜炎球菌作用都很强。金黄色葡萄球菌可产生青霉素菌将青霉素水解失活,表现为耐药性。

阅读理解

A poor farmer had a  friend who was famous for the wonderful apple trees he grew.

One day, his friend gave the farmer a young apple tree and told him to plant it.  The farmer was pleased with the gift, but he did not know where to plant it.

He was afraid that if he planted the tree near the road, strangers would steal the fruit.  If he planted the tree in one of his fields, his neighbors would come at night and steal some of the apples.  If he planted the tree near his house, his children would take the fruit.  Finally he planted the tree in his wood.  But without sunlight and good soil(土壤), the tree soon died.

Later the friend asked the farmer why he had planted the tree in such a poor place.  “What’s the difference?” the farmer said angrily and then told what he had thought.

“Yes,” said the friend, “but at least someone could have enjoyed the fruit.  Now you not only have robbed everyone of the fruit, but also you have destroyed (毁掉) a good apple tree! ”

小题1:What gift did the farmer get from his friend one day?

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小题2:How many people are there in the story?

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小题3:Where did the farmer plant the apple tree at last?

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小题4:Why did the apple tree soon die?

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小题5:Who destroyed the apple tree?

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单项选择题