将金属加热到一定温度，并保持一定时间，然后以一定的冷却速度冷却到室温的过程称为( )。
D
暂无解析
Acompoundisthecombinationofonlytwowords.
WhenyouwereinLondon,didyouvisit________________Tower,too?
ThedifferencesbetweensynonymsexistinthefollowingareasEXCEPT______.
Nobodyintheclassagreeswithyou,________________?
is,are,was,were,willbe,aregoingtobe,have,has,hadThebeautiful________somethingthattheinnocent________notalwaysabletoappreciatefully.