全闭环伺服系统与半闭环伺服系统的区别取决于运动部件上的（）。
A、执行机构；
B、反馈信号；
C、检测元件
参考答案：C
用所给词的正确形式填空。
1. His father worked for twenty hours without_____ (stop).
2. Norman Bethune will _____ (miss) by Chinese people forever.
3. Mother bought enough food_____ (feed) our dog.
4. Einstein's letter asked people_____ (give) up nuclear weapons.
5. Now he is working on _____ (develop) new machine.
可作为中重度痴呆患者的筛查与评定（）
A.EPQ
B.BPRS
C.WAIS
D.HamiltonRatingScaleforAnxiety
E.MMSE
