慢性皮肤病见侵润肥厚,角化过度,应选用()
A.溶液
B.软膏
C.粉剂
D.油剂
E.乳剂
参考答案:B, E
Listen! They ______ in the next room.[ ]
A. sing
B. is singing
C. are singing
D. were singing
气囊式蓄能器通常充的是()。
A.空气
B.氧气
C.氮气
D.二氧化碳