试题与答案

角膜细菌感染时,导致角膜损伤的主要细胞是() A.巨噬细胞 B.淋巴细胞 C

题型:单项选择题

题目:

角膜细菌感染时,导致角膜损伤的主要细胞是()

A.巨噬细胞

B.淋巴细胞

C.多形核白细胞

D.T淋巴细胞

E.嗜酸性粒细胞

答案:

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阅读理解。

                                                               A Trip to the Forest

    One day Bob took two of his friends into the mountains. They put up their tents and then rode off to a

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    In the afternoon when they were about ten kilometres from their camp (营地), it started to snow. More

and more snow fell. Soon Bob could hardly see his hands before his face. He could not find the road. Bob

knew there were two roads. One road went to the camp, and the other went to his house. But all was white

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    Bob had an idea. The horses! Let the horses take them back! But what would happen if the horses took

the road to his house? That would be a trip of thirty-five kilometres in such cold weather!

    It was getting late. They rode on and on. At last the horses stopped. Where were they?

    None of them could tell. John looked around. What was that under the tree? It was one of their tents!

1. John and his two friends went to the forest to ______. [ ]

A. build their camp

B. find their way home

C. enjoy the mountains in the snow

D. watch the trees in the forest

2. They could not find their way back because ______. [ ]

A. there was only one road to their camp

B. they couldn't decide which of the two roads led to their tents

C. there were no roads in the mountains at all

D. everything was covered by the white snow

3. It is clear that they wanted the horses to take them to ______. [ ]

A. John's house

B. the camp

C. the forest

D. the mountains

4. The horses stopped because ______. [ ]

A. it was getting late

B. they were tired after running for a long way

C. they knew that they had got to the camp

D. they had seen John's house

5. The story happened ______. [ ]

A. on a cold winter day

B. on a dark snowy evening

C. in a cold camp far from villages

D. at night when nothing could be seen

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