妊娠剧吐的中医总病机是()A.冲气上逆，胃失和降 B.痰浊上扰，胃失和降 C.肝胃不

Though ______ water, he managed to survive for one week under the ruined house.

A．lacked

B．lacking

C．lacking of

D．lacked in

小号双重隔电子最多只能装设（）皮线。

A.一条

B.两条

About ___ of the teahers is our school ___ young people under thirty.

A．two-five, are

B．second-fifth, is

C．two-fifths, are

D．two-fifths, is

一贯煎的功用是（）。

A.清胃滋阴

B.清胃凉血

C.滋阴补肾

D.养血疏肝

E.滋阴疏肝

晶闸管的额定电压为（）。

A.正向重复峰值电压

B.反向重复峰值电压

C.正反向重复峰值电压中大者

D.正反向重复峰值电压中小者