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

补全对话

A: What does your father do?

B:  He is a police officer.

A: Do you want to have the same job as your father does?

B: Oh, yes.  Sometimes it's exciting.  1. ________

A: I'm going to be a bank clerk.

B: 2. ________A: I'm going to study math really hard.

B: Where are you going to work?

A:  3. ________Maybe China Bank, the famous bank in town.

B: Lisa, do you want to be a bank clerk, too?

C:  No,  not really.  4________ I love children very much.

B: 5. ________