单项选择题
A.Power factor B.Power ratio C.compression ratio D.Compression factor
The pump used to send the bilge water into the oily wat...
单项选择题The pump used to send the bilge water into the oily water separator（）the mixture because this might create finer oil particles.
A.should agitate B.should not agitate C.should mix up D.should not add up
The rising velocity of the globules carries them upward...
单项选择题The rising velocity of the globules carries them upwards where they become trapped by the under surfaces of plates and （）until the enlarged globules have sufficient rising velocity to travel along the plate surface and break away at periphery.
Humans are still needed to monitor the condition of the...
单项选择题Humans are still needed to monitor the condition of the boiler all the time the latter is operated, （）it is just to acknowledge an alarm buzzer or flashing light in a control room.
A.even if B.so that C.such that D.in order that
