重烧成变化率
参考答案：
是烧成的耐火制品再次加热到规定温度，保温一定时间，冷却到室温所产生的残余膨胀和收缩。
When the seriously injured man was taken to a hospital _____, he was half conscious; while lying in bed, he heard a voice ______ calling him. [ ]
A. close; at a distance
B. near; in the distance
C. nearby; in the distance
D. close; from distance
室内采暖系统与室外供热管网相连接处的( )等统称为采暖系统入口装置。
A．阀门
B．仪表
C．减压装置
D．膨胀管
