空冷塔液位的测量，实际上是测量液体上边和液体底部的（）。
A.压力差
B.温度差
C.比容差
D.密度差
参考答案：A
______ somewhat weak infrastructure, Hong Kong’s overall economic performance and business
efficiency make it Asia's leading financial capital for a long time.
A．Although
B．While
C．Despite of
D．In spite of
正常操作时，负荷波动不会造成反应器出口分析不合格。
