西医的银屑病中医称为()
A.白屑病
B.圆癣
C.血风疮
D.白疕
E.摄领疮
参考答案:D
Not having a good ________ of English can be a serious barrier to achieving your goals.
A.demand
B.appreciation
C.command
D.experience
如图所示的压缩机组流程,其中A为从动机,B为原动机。