因物价波动引起的价格调整，可采用价格指数法，在确定可调因子的

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问题单项选择题

因物价波动引起的价格调整，可采用价格指数法，在确定可调因子的基本价格指数时，所选择的基准日期是指()。

A．投标截止期前28天

B．投标截止期前42天

C．开工日期前28天

D．开工日期前42天

答案

参考答案：A

阅读理解

根据短文内容完成下列句子

Barbie Doll is very famous in the world. After more than 50 years, Barbie is still popular among

(在......中) girls all over the world: But now the makers of Barbie show their first black dolls to people.

These new black Barbie Dolls are different from the old ones. They have fuller lips(更丰满的嘴唇)

and a wider nose. They look like black girls very much. So people call them the real black Barbie Dolls.

The designer(设计师) of the black Barbie Dolls is also black.”I want my daughter and other black

children to know that black is beautiful," she said.

1. Barbie Doll is very __________ in the world.

2. Barbie Doll is popular among __________ around the world.

3. The black Barbie Dolls look like __________ very much.

4. The new Barbie Dolls have __________ lips and a __________ nose.

5. The designer of the black Barbie Dolls is a__________ woman.

单项选择题共用题干题

一九四五年找出某厂的1000名在表上涂镭的女工，比较这些女工与1000名女电话接线员自1945～1975年骨瘤发生率。在此期间，涂镭女工有20例骨瘤患者，而接线员只有4例。

上述研究的人群归因危险度百分比为（）。

A.0.40‰

B.0.89‰

C.92.7%

D.87.5%

E.0.49‰