石菖蒲的功效有()
A.开窍
B.宁神
C.止痛
D.化湿
E.和胃
参考答案:A, B, D, E
肺下界降低常见于 ( )
A.胸腔积液
B.肺萎缩
C.肺炎
D.腹水
E.肺气肿
The manager ordered that the work ________ at once.[ ]
A.be done
B.should do
C.could do
D.does