采用高质量的铁皮球,对脱磷反应()。
A.有利
B.有害
C.无影响
D.都不对
参考答案:A
张仲景被称为“医圣”,他的哪一著作至今仍为医生必读书籍
A.《黄帝内经》
B.《本草纲目》
C.《神农本草经》
D.《伤寒杂病论》
The ship would have sunk with all on board ______ for the captain.
A.if it was not
B.had it not been
C.if it has not been
D.not had it been.