By the increase in Mo content,the addition of microalloying elements V and Nb and by reducing the contents of Mn,P and S based on the composition of steel 42 Cr
教学过程Step1.Warm upT:Good morning,boys andgirls.Ss:Good morning.T:How are you today?Ss:Fine,thank you.T:Is it a…?May I have…?Ss:Sure.Here you are.T:Thank yo
【链接高考】 (2009年湖北卷)Learning strategies, to ___________ (老师们认为) importance have not drawn enough attention of students. (attach) 答案 which (the) teachers attach/have attached 解析 该题有一定难度,当年得分率较低。题