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【判断题】
三次冷却或空指相变之后直到室温这一温度区间的冷却参数控制。对于一般钢材，相变完成，形成体和珠光体。相变后多采用空冷，使钢板冷却均匀、不发生因冷却不均匀而造成的弯曲变形，确保板形质量。另外，固溶在体中的过饱和碳化物在空不断弥散析出，使其沉淀强化。A.
正确
B.
错误
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【简答题】阴维脉维系、联络全身的()经;阳维脉维系、联络全身的()经。
【简答题】小题1:The car is too e__________, we don’t want to buy it. 小题2: The box is very h______. I can’t carry it. 小题3:The boy doesn’t like studying and he didn’t pass the e_____. 小题4:We went to the History M__...
【单选题】Look ! The boy is making a toy plane by ___________. [ ]
A.
itself
B.
myself
C.
yourself
D.
himself
【简答题】In the very early 1800’ s, a young boy about 14 years old named John lived in an orphanage (孤儿院) in Old England along with several other children. Orphan meant unwanted and unloved. Christmas was the...
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