平太阳的赤经日变化量约为（）。
A．66.6
B．53.2
C．62.3
D．59.14
参考答案：D
172. --- Where did you see him?
--- It was in the hotel ______.
A．where he stayed
B．that he stayed
C．in that he stayed
D．which he stayed
某恒温恒湿空调系统冬季用喷水室喷13.5℃的循环水对空气进行加湿，通过处理室的风量是7200kg/h，喷水前后空气的干球温度分别为17.5℃和14℃，则喷水室的补水量约为（）。
A.5kg/h
B.10kg/h
C.15kg/h
D.20kg/h
