在用比例调节器组成的控制系统中,若PB=120%,调节器输出使调节阀开度变化全行程的一半,则被控量变化了全量程的()
A.100%
B.120%
C.60%
D.30%
参考答案:C
A.海上航行的轮船
B.空中飞行的子弹
C.吊在天花板上的电灯
D.拉开的弓
I wrote down his name and address ______ I should forget it.
A. in order that B. for fear thatC. so that D. since