根据室温组织及含碳量钢如何分类?
参考答案:
(1)亚共析钢:0.0218<C<0.77%;
(2)共析钢:C=0.77%;
(3)过共析钢:0.77%<C<2.11%。
Are they _____________ cards? [ ]
A. plays
B. playing
C. played
某校七年级共有320名同学去某军营参加军训,已有65名学生坐校车出发,现还要几辆45座的大巴?