ZDll5型电机电刷装置的刷架圈上均布着（）刷握装置。
A、4个
B、5个
C、6个
D、7个
参考答案：C
The Silent Way is considered suitable for______.
A．more advanced learners
B．beginners
C．more advanced classes and beginners
D．learners interaction with each other
脑性瘫痪患者常采取的步态是（）
A.醉酒步态
B.慌张步态
C.剪刀步态
D.跨阈步态
E.共济失调步态
