完全退火主要适用于()
A.亚共析钢
B.共析钢
C.过共析钢
参考答案:A
—How long do you think it will be______ man can finally solve the problem of cancer?
—Well,it depends
A.when
B.until
C.after
D.before
[问题3] 请简要说出DHCP服务的基本流程。