问题 单项选择题 共用题干题

淋巴细胞的表面抗原的检测可用于T淋巴细胞的亚群分类、功能分析等。CD抗原是淋巴细胞表面的分化抗原。

T淋巴细胞识别抗原后的信号传递是通过()

A.CD3

B.CD4

C.CD5

D.CD7

E.CD16

答案

参考答案:A

阅读理解

阅读理解。

    Some time ago I discovered that one of my chairs had a broken leg. I didn't think

there would be any difficulty in getting it mended, as there are a whole lot of antique

(古董) shops near my home. So I left home one morning carrying the chair with me.

I went into the first shop expecting a friendly reception. I was quite wrong. The man

wouldn't even look at my chair.

    The second shop, though slightly more polite, was just the same, and the third and

the fourth-so I decided that my approach must be wrong.

    I entered the fifth shop with a plan in my mind. I placed the chair on the floor and

said to the shopkeeper, "Would you like to buy a chair?" "Twenty pounds," I said. "OK,"

he said. "I'll give you twenty pounds." "It's got a slightly broken leg," I said. "Yes,

I saw that. It's nothing."

    Everything was going according to the plan and I was getting excited. "What will you

do with it?" I asked. "Oh, it will be easy to sell once the repair is done." "I'll buy

it," I said. "What do you mean? You've just sold it to me," he said. "Yes, I know but I've

changed my mind. I am sorry. I'll give you twenty-seven pounds for it." "You must be

crazy," he said. Then, suddenly the penny dropped. "I know what you want. You want

me to repair your chair." "You're right," I said. "And what would you have done if I had

walked in and said, 'Would you mend this chair for me?'" "I wouldn't have agreed to do

it," he said. "We don't do repairs, not enough money in it and too much trouble. But I'll

mend this for you. Shall we say for a fiver?" He was a very nice man and was greatly

amused by the whole thing.

1. We can learn from the text that in the first shop the writer _____. [ ]

A. was rather impolite

B. was warmly received

C. asked the shopkeeper to buy his chair

D. asked the shopkeeper to repair his chair

2. The expression "the penny dropped" in the last paragraph means the shopkeeper _____. [ ]

A. changed his mind

B. accepted the offer

C. saw the writer's purpose

D. decided to help the writer

3. How much did the writer pay? [ ]

A. £ 5.

B. £ 7.

C. £ 20.

D. £ 27.

4. From the text, we can learn that the writer was _____. [ ]

A. honest

B. careful

C. smart

D. funny

问答题 案例分析题

中共十八大报告把生态文明建设放在突出地位,提出“我们一定要更加自觉地珍爱自然,更加积极地保护生态,努力走向社会主义生态文明新时代”。建设生态文明,需借鉴历史经验教训。

材料一:欧洲人的发现不仅导致新的全球性视野,也导致了美洲——欧亚大陆之间疾病传播,阅读下列表格

——彭顺生《哥伦布发现美洲于人类交往》

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——李宏图《英国工业革命时期的环境污染和治理》

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——摘自高国荣《美国大平原的荒漠化:缘起及其治理》

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——摘自包茂宏《苏联的环境破坏和环境主义运动》

根据材料四,结合苏联社会主义建设的特点,分析造成其环境问题的主要原因。《生态灭绝》杂志所说的主要观点是什么?(不得摘抄原文)综合上述材料,在经济发展和环境保护方面对当今中国有何启示?