风冷式冷凝器的（）和冷凝压力都比水冷式冷凝器高。
A.蒸发压力
B.蒸发温度
C.冷凝温度
D.吸收压力
参考答案：C
We had a long meeting yesterday. It _____ four hours.
A．kept
B．spent
C．continued
D．lasted
膻味
