淬火是钢最重要的强化方法,其本质是()转变。
A.奥氏体
B.马氏体
C.铁素体
D.珠光体
参考答案:B
--Have you any oranges and apples?
--__________
A.Yes, madam, on the second shelf over there
B.The oranges are very cheap.
C.You like apples, don’t you?
D.Of course, we have some fruits.
SLE患者体内增高的Ig类型有()
A.IgM
B.IgG
C.IgE
D.IgA
E.以上都不对