基础辅助麻醉药有哪些()
A.异丙嗪
B.地西泮
C.哌替啶
D.氧化亚氮
E.阿托品
参考答案:A, B, C, D
As we all know, _________ exercise will help to strengthen the heart and improve circulation of the blood.
A.normal
B.average
C.regular
D.ordinary
砂型铸造的配砂,需要()。
A.配型砂
B.配型芯砂
C.A+B
D.A或B