影响毒物作用的因素是:()
A.个体的营养和健康状况
B.毒物的量
C.毒物的化学结构
D.接触毒物的时间
E.毒物的物理性质
参考答案:A, B, C, D, E
- I could read and write when I was four years old.
- Really? _____. [ ]
A. so did I
B. so I do
C. so could I
D. so can I
人类社会自从有了分工,就有了职业道德。()