65Mn钢按含碳量分属于（）钢。
A、低碳
B、中碳
C、高碳
D、结构
参考答案：C
It took him two hours _______ the meal by himself.[ ]
A. cooking
B. cook
C. to cook
D. cooks
肌肤濡软，按之痛减多提示（）
A.实证
B.瘀血
C.虫积
D.虚证
E.肠痈
