水泥的性能指标不包括（）。
A．细度
B．强度
C．硬度
D．水化热
参考答案：B
解析：
hey, Alice. You___ on the phone a moment ago. But you weren’t here and I took a message for you.
Oh? I was in the library.
A．are wanted
B．were wanted
C．are called
D．have called
质量是1.5kg的水，温度从80℃降低到30℃，求：水放出的热量是多少？[已知：水的比热容等于4.2×103J/（kg•℃）]．
