问题 单项选择题 共用题干题

2005年2月,某轮船上发生原因不明肺炎的暴发流行。出港时船上共有350名乘客,2月份第一周(1~7日)中,船上有30人发生肺炎,其中一半很快死亡。接下来的一周内又有20人发病,但没有死亡病例,假设该病病程约为1个月。

2月7日该不明原因肺炎的患病率是()。

A.0.045

B.0.075

C.0.143

D.资料不全,无法计算

E.以上答案均不正确

答案

参考答案:A

完形填空

There are many kinds of pollution around us,  1  air pollution, soil pollution, noise pollution and light pollution. They are bad __2__ our health in many ways.

Burning gas, oil and coal creates air pollution. It can cause sore eyes and __3__ problems.

With the increase of pollution and the development of industry, litter is everywhere. It makes our environment dirty. People put lots of rubbish in the land. Farmers use too many __4___ in the fields. They destroy the soil. So soil pollution has become serious.

Noise pollution can make people__5_. For example, people may lose their hearing if they work in a _6_ place for a long time. Too much noise can cause high blood pressure __7__.

Working for a long time in strong, changeable light __8__ cause some kinds of illnesses. It makes people feel __9__ and is especially bad for the eyes.

With ___10__ pollution, our planet will become greener and our health will be better. Let’s be greener people.

1. A. such as           B. for example          C. as well as      D. because of

2. A. to           B. in                  C. for            D. of

3. A. breath       B. breathe         C. breathed       D. breathing

4. A. chemical      B. chemicals           C. chemist        D. chemistry

5. A. blind         B. lame            C. deaf           D. healthy

6. A. noise        B. noisy              C. quiet           D. quietly

7. A. as well          B. too                C. also            D. either

8 A. must          B. need           C. should          D. may

9. A. comfortable  B. possibly         C. terrible      D. terribly

10. A. little           B. less            C. few         D. fewer

单项选择题