连续控制器
参考答案：
能用来调节一个连续体中的任何值，可完成数量调节和连续控制的功能。
I've made a mistake, though I didn't ________.
A．intend
B．intend so
C．intend to
D．intend making
— Sorry, I have to _____ now. It's time for class.
— OK, I'll call back later. [ ]
A. hang up
B. break up
C. give up
D. hold up
