钢号40Mn2中的40表示()。
A.含碳量
B.含铁量
C.含锰量
参考答案:A
He asked the beautiful girl to ___.
A.marry him
B.marry with him
C.get married with him
D.marry to him
乳食积滞腹痛具有以下特点()
A.发作前有伤食史
B.脘腹胀满疼痛
C.按之腹痛减轻
D.吐后腹痛减轻
E.泻后腹痛减轻