Excessive oil foaming in the crankcase of a refrigeration compressor is most likely to occur when the compressor
A.has run continuously for a long period
B.suction pressure is below normal
C.oil level is below normal
D.starts after a long idle period
第1题:
第2题:
A variety of small clubs can provide _____ opportunities for leadership, as well as for practice in successful group dynamics.
[A] durable
[B] excessive
[C] surplus
[D] multiple
第3题:
第4题:
A.similar
B.alike
C.same
D.likely
第5题:
请在(11)处填上最佳答案。
[A] excessive
[B] enormous
[C] significant
[D] magnificent
第6题: