反映一组呈正偏态分布特征的资料平均水平用A.平均数 B.中位数 C.均数 D.几何均

题型:单项选择题

问题:

反映一组呈正偏态分布特征的资料平均水平用

A.平均数

B.中位数

C.均数

D.几何均数

E.算术均数

考点:临床执业助理医师预防医学预防医学(八)
题型:单项选择题

阅读短文,回答问题。

     I am Lisa, I study in Beijing International School now. There are fifty-four students in my class.

Only six students go to school on foot, because they live near our school. Li Xiang says it usually takes

him about fifteen minutes to walk to school. Eighteen students go to school by bike.

     Some of them think it is faster to ride bikes than to take buses in the morning and evening. They also

think riding bikes is good for them. Twenty-two students take buses or the subway to school. Most of

them have to take more than one bus to get to school, so they must get up early every day. And other

students go to school by car. Their parents drive them to school first, and then go to work. Do you know

how I get to school? I'm one of the eighteen people.

1. How long does it take Li Xiang to get to school on foot?

    ___________________________________________________________________

2. What do some students think is good for them?

    ___________________________________________________________________

3. Why do the twenty-two students get up early every day?

    ___________________________________________________________________

4. How many students go to school by car?

    ___________________________________________________________________

5. How does Lisa go to school?

    ___________________________________________________________________

题型:单项选择题

在层次模型中,进行插入、删除、更新操作时,分别需要满足的完整性约束主要有哪些?

题型:单项选择题

用生产法计算工业增加值时,应从工业总产出中剔除()。

A.工业中间投入

B.应交增值税

C.劳动者报酬

D.固定资产折旧

题型:单项选择题

在实施WAIS-RC的图画填充分测验时,下列说法中正确的是()。

A.仅第一图告之缺少部分

B.第一、二图均告之缺少部分

C.任何图均不告之缺少部分

D.每图限时20秒

题型:单项选择题

确定会场的整体格局要根据()。

A.会议的规格

B.会议的规模

C.会议的性质

D.会议的形式

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