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问题 单项选择题

在一项有500名病例和500名对照的研究中，分别在400名病例和100名对照中发现可疑病因因素。具有该因素的人发生该病的绝对危险度是（）。

A.16%

B.40%

C.80%

D.20%

E.由上述资料不能计算

答案

参考答案：E

填空题

用括号内所给单词的适当形式填空。

1. The _____ (clean) clean the roads early in the morning.

2. Tom was the _____ (five) runner past the finishing line.

3. You'd better _____ (not drink) too much water before you go to bed.

4. The old man looked at them _____ (angry) and couldn't say a word.

5. The panda has been _____ (die) for about two months.

6. In summer it _____ (rain) little in this city, so everyone must save water.

7. Look! The Greens _____ (get) ready for the journey.

8. So far, most of the children _____ (see) the film "Harry Potter".

9. There _____ (be) a talk on science in our school tomorrow afternoon.

10. I _____ (forget) the time for the meeting, so I was late.

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判断题

某一月份合约在其交易过程中的不同阶段，分别适用不同的限仓数额，进入交割月份合约限仓数额可以放开。（）
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