响应时间是指从进样开始至到达记录仪最终指示的90%处所需要的时间。( )
参考答案：对
判断下图所示系统的稳定性，稳定裕度为（）。
A．63.43°
B．30°
C．43°
D．90°
Between the two generations, it is often not their age, _____ their education that causes misunderstanding. [ ]
A. like
B. as
C. or
D. but
