钢中含洛量为13%~19%,含碳量为0.1%~0.45%,则称该钢为()。
A.铁素体型不锈钢
B.马氏体型不锈钢
C.奥氏体型不锈钢
D.奥氏体—铁素体型不锈钢
参考答案:B
— _____________________?
— I can't find my key. [ ]
A. What are you doing
B. What's the matter
C. Where is my key
什么是非承担三包修理者?