吊钩、吊环一般都采用20号优质碳素钢或16Mn钢制作,因为这两种材料的()较好。
A、强度
B、硬度
C、韧性
D、延展性
参考答案:C
There is so much delicious food in the menu. I can't decide .
A.how to eat
B.where to eat
C.what to eat
D.when to eat
()年,淮南师范专科学校停办。
A.1956
B.1958
C.1962
D.1964