因素分析法的方法论基础是() A.指标体系 B.指数体系 C.综合指数 D.总指数

题型:单项选择题

问题:

因素分析法的方法论基础是()

A.指标体系

B.指数体系

C.综合指数

D.总指数

考点:统计学统计学综合练习统计学综合练习题库
题型:单项选择题

根据短文内容,在空格处填入一个适当的词,使短文意思完整。

    Why do people drink? Often because they are 1           , but this can't be the 2            reason. There

 3             be other reasons, too. In many countries, when friends see each other, they often have a

drink 4            they sit and talk. Many English people don't need anyone 5          , they drink tea several

times 6            day even if they are alone.

    In most countries people say something interesting when they drink 7           . The English often say

cheer. In the countries there are many places (cafes, bars) where they 8            drinks. 9            there

are so many drink places, it seems that many people drink more often than they really 10            it.

题型:单项选择题

转导与溶原性转换的共同点是()

A.以噬菌体为载体

B.转移的遗传物质为供体菌的DNA

C.有关的噬菌体均为缺陷型

D.可由雌性菌变为雄性菌

E.通过性菌毛连接沟通

题型:单项选择题

许多薯片包装袋中常充入一种气体,看上去像个小枕头,这种气体是二氧化碳还是氮气? 

(1)请设计一个实验来证明你预测的正确性。

(2)你认为给食品充气包装,对所充气体的要求是________________ 。

题型:单项选择题

25岁男性,牙冠切1/3横断,近中髓角暴露24h,无松动,口内余牙无异常。咬合关系正常。未检查出骨折,口内黏膜无创口。

最需做的治疗是()

A.干髓术

B.拔髓术

C.活髓切断术

D.直接盖髓术

E.塑化治疗

题型:单项选择题

引起轴承振动的轴瓦方面的原因有哪些?

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