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问题 单项选择题 A1型题

为制定血铅的参考值范围，测定了一批正常人的血铅含量，下列说法正确的是（）

A.可以制定双侧95%的参考值范围

B.可以制定，应是单侧上限

C.可以制定，应是单侧下限

D.可以制定，但无法确定是上侧还是下侧范围

E.无法制定，要制定参考值范围必须测定健康人的尿铅含量

答案

参考答案：B

填空题

单词拼写：根据句义，首字母及汉语提示，写出正确的单词。

1. Our _____(政府) paid more attention to the air pollution.

2. We'll ______ (保护) the plants against the weather.

3. When he came to the office on the seventh floor, he was out of _____ (呼吸).

4. Your suggestion sounds very ______( 吸引人 ).

5. — Don't you think Martin has been ______(举止) very strangely recently?

    —  Yes. But he wasn't what he is?

6. The film is suitable for both a_______ and children.

7. Cao and her two children were among the first people on the ship who were r_____ by lifeboats.

8. It was b_____ of him to enter the burning house.

9. She is a brave girl. She is never s______ of anything.

10. Swimming is my favourite sport. It is one of my h______.

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单项选择题

关于正偏峰分布资料的描述，说法正确的是（）。

A.大多数变量值集中在较大的一端

B.绘成的曲线高峰偏右，长尾向左侧

C.绘成的曲线高峰偏左，长尾向右侧

D.可用算术均数表示其平均水平

E.可考虑运用几何均数标来描述其集中位置
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