确定碳钢淬火温度的主要依据是()。
A、Ms线
B、C曲线
C、Fe-Fe3C相图
参考答案:C
The school isn’t the one I really wanted to go to, but I suppose I’ll just have to ______it,
A.make the best of
B.get away from
C.keep an eye on
D.catch up with
国际技术贸易是指国际间的技术如何转让()
A.有偿
B.无偿
C.等价
D.交换