What are ____________ going to do on Sunday? [ ]
A. them
B. they
C. their
答案:B
气闭、气脱病机,指的是()
A.元气耗损,脏腑功能减退,抗病力下降
B.气机不畅,流通受阻,脏腑经络功能障碍
C.气机升降失常,脏腑之气上冲
D.气虚升举无力,脏腑位置下移
E.气的出入异常,或为闭阻,或为外散
电动机转子怎样校动平衡?