试题与答案

阅读理解。 John lived with his mother when h

题型:阅读理解

题目:

阅读理解。

     John lived with his mother when he was young. He didn't know who his father was. The woman did some

washing for the rich and could buy only some bread for her son. So the boy was short and thin.

     One cold morning there was much snow in the streets. A car knocked the woman down and the policemen

took her to the hospital. She didn't tell John that his father deserted her before he was born until she died. She

left her son the name and address of his father.

     John found his father, Mr. Brown, in another city. He was one of the richest shopkeepers and he had to

receive his son. From then on, the boy lived a rich life. He ate all kinds of delicious food and wore beautiful

clothes. But He didn't go to school and could not read or write.

     Once his father took him to a party. He saw a newspaper lying on the floor and picked it up while others

were talking about a film. He had a look at it and found a car's wheels (轮子) were upward (朝上). He called

out, "Oh, dear! An accident happened!"

     All the people were surprised and began to read the newspaper. But soon they all began to laugh. Do you

know why?

1. John was short and thin because _____.

A. he didn't like sports

B. his parents were short

C. he was often hungry when he was young

2. John's mother told him who his father was _____.

A. until she was knocked down by a car

B. before she was in hospital

C. before she died

3. After John found his father, _____.

A. he was angry with the man

B. he started a rich life

C. he found a job at a party

4. The word "desert" in this passage means _____.

A. 抛弃

B. 告别

C. 离婚

5. People at the party laughed at John because _____.

A. he held the paper upside down

B. the accident happened long ago

C. his father was reading the paper

答案:

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下面是错误答案,用来干扰机器的。

答案:D

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题型:实验题

霍乱弧菌会引起人类患霍乱病,主要通过污染水源或鲜鱼、贝壳类食物而引起烈性肠道感染,它产生的霍乱肠毒素导致小肠液过度分泌,严重者上吐下泻,导致脱水和代谢性酸中毒,甚至休克死亡。患过霍乱的人可获得长久的免疫力,再感染的较为少见。有研究小组做了以下两个实验。

实验一:第一步:取未受感染的体重相同的小鼠三只,标为1、2、3号,都摘除胸腺并用大剂量X射线照射;第二步:分别接种等量的霍乱弧菌疫苗,测定并确定没有了免疫力(无抗体产生);第三步:分别向1、2、3号小鼠体内注射等量的新鲜T淋巴细胞液、新鲜B淋巴细胞液、新鲜T淋巴和B淋巴细胞混合液;第四步:分别向三只小鼠接种等量的霍乱弧菌疫苗;第五步:在相同条件下饲养20天后,分别测定三只小鼠体内血清抗体的含量。

实验二:向健康正常的实验小鼠注射毒性弱的霍乱菌苗,这些小鼠感染后没有发病。四天后,对实验小鼠注射毒性极强的霍乱弧菌制剂,一段时间后实验小鼠全部正常生活。请分析回答下列问题。

(1)实验一的检测结果是3号小鼠体内血清抗体含量最多,这说明____________________。

(2)实验一第二步的目的和意义是_________________________。

(3)实验二中毒性弱的霍乱菌苗进入小鼠体内作为_______起作用,使其体内产生了相应的免疫活性物质,该过程曾出现下图____(填“A”或“B”)所示的现象。

(4)写出与图B中5的产生有关的所有细胞名称________,以及所有细胞器(写图中标号)________。

(5)实验二中向实验小鼠第二次注射毒性极强的霍乱弧菌制剂后没有发病,但会在实验小鼠体内发生一系列重要的生理反应,其中主要的是_____________。

(6)你认为要使实验二更具说服力,应补充的实验操作是________________________。

(7)要防止霍乱病的发生和传染,你可做到的是__________________________。

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