问题 配伍题 B型题

指与可接受危险度相对应的化学毒物的接触剂量的是() |指化学毒物在特定条件下,伴随的危险度很低或其危险度水平在社会所能接受的范围之内的是() |指在特定条件下,因接触某水平化学毒物而造成机体损害作用预期概率的是()

A.危险度

B.安全性

C.实际安全剂量

D.可接受的危险度

E.不确定系数

答案

参考答案:C|B|A

判断题
完形填空

It is reported that over 300 million people in China are suffering from nearsightedness. As more children have got eye trouble, their parents hope to cure the disease by some different ways, such as by correcting the way children read and sit. But in fact, one should start with the exercise with one’s feet. Here are three ways to save eyes.

First, don’t tie your shoes too closely. Try to wear comfortable and soft shoes and socks or walking without shoes and socks at home. While you are travelling, try to wear cloth shoes in order to improve blood circulation.

Second, walking on tiptoe is good for one’s eyesight. It can fight against eyesight trouble. Numbers show that most of ballet performers’ eyesight is better..

Third, rope skipping does good to one’s eyesight. When skipping the rope, one has to move quickly, making both the brain and the eyes excited. It may also help make one grow taller.

Besides foot exercises, it is good to pull one’s ears. Pulling the ears 20 times quickly is also a great way. It can keep one’s eyes healthy.

根据上面短文内容填空:

小题1:It is reported that _________ people have got eye trouble, especially_________.

小题2:In fact, one should start with the exercise with one’s feet instead of __________ children read and sit and there are ____________ ways to save eyes.

小题3: When we are traveling, we should try to wear _____________ because they are ________________.

小题4:Numbers show that most of  ___________ eyesight is better because ___________ is good for one’s eyesight.

小题5: It is also a great way _________20 times quickly besides__________ .