拮抗作用
参考答案：
即生物体中，一种元素对另一种元素的正常生理功能产生干扰的现象，它既可以是抑制，也可以是抵消。
—Fined ￥100! You know you were driving 100 KM an hour, don't you?
—No, officer. I _____．This car doesn't do 80．
A．shouldn't have been
B．mustn't have been
C．can't have been
D．mightn't have been
为什么脱硫PIC-2调节器失电后调节阀处于全开状态？
