下列哪项不是阳水的特点
A.多夹风邪
B.起病急,病程短
C.皮肤光亮而薄
D.按之凹陷难复
E.头面先肿
参考答案:D
This is ___that they all want to but it.
A.a so useful book
B.such an useful book
C.a such useful book
D.so useful a book
简述P、S对钢的危害性及有益作用。