提高钢的热稳定性和热强性的元素为()
A.Cr
B.C
C.Si
参考答案:A
. ---What has Tom been doing recently?
---I don’t know, ___________care.
A.nor do I
B.nor I do
C.neither am I
D.neither I am
半夏为止呕要药,对痰饮呕吐及胃热呕吐尤宜。