上述中药中属于麻醉药品的是()
A.全蝎
B.硫黄
C.罂粟壳
D.蟾酥
E.水蛭
参考答案:C
He________an engineer by an oil company in the Middle East.
A.was employed as
B.employed as
C.was employed for
D.employed
先将电梯机房总电源切断,通知电梯维修人员前来()。