题目内容
退火与正火的区别在于:退火采用()冷却;正火是在()冷却
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正火冷却速度比退火(),因此硬度比退火稍()
对于有网状二次渗碳体的过共析钢,可以不做处理就直接进行球化退火。
Fill in the gaps with words or phrases given in thebox. Changethe form where necessary1)Prof.Willianms says that my composition is good except for the ending which seems too _______.2)Suffering from insomnia for several days, Ann went to see her doctor and was told that the problem was more ______ than physical.3)The organizer of the charity concert said,” Iask all of you to join me in praying that God will _____ those who have given so generously for the poor and needy.4)The insurance policy doesnot cover damage to the goods caused by normal ______________.5)The old economic beliefs are widely regarded as too_____ to be useful in solving the problems now emerging in our economy.6)You arefree to say what you think, but as a responsible individual you shouldalso be prepared to face the______ of what you say.7)Prices are going down. However this _______welcome change may bring about other problems in the economy.8)John’s view on the train crash stands _______________those of almost all of his colleagues.9)_________ is the most powerful driving force in one’s pursuit of knowledge.10)After teaching grade school for a year or so, she felt a ______love for the pupils.11)Donations from alumni are an important source of the university’s income. But research funds come ____________from the government.12)Should judges consider popular______ before deciding cases?
阴的特性是什么？阳的特性是什么？
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