In a complete oil/water separator, more oil will separate out onto the underside of these plates and travel outwards until it is free to rise into the oil collecting space Whats the meaning of "it" in the sentence above?（）

[主观题]H．ow to operate oily water separator?

[单选题]If there is water in fuel oil, the revolution of the engine will （）.A . decreaseB . increaseC . be dismantledD . be reassembled

[单选题]A．s for turbine oil, contact with water in the form of steam will be inevitable so good______properties will be essentialA．defrostingB．de-oilingC．demulsifyingD．dehumidifying

[单选题]The problem of underground water is more serious because（ ）[A] the underground water trickles away all the year round[B] the underground water is hidden deep beneath the Earth[C] the change of it must be controlled by the NASA's satellites[D] the dr

[单选题]Here some oil in the oily water separator, as a result of its lower （）, will separate and rise into the oil collection space.A . temperatureB . viscosityC . densityD . velocity

[单选题]_______can cause oil flow from water outlet of the oil purifier.A．Oil inlet valve opening too quicklyB．Oil temperature little higher than normalC．Diameter of gravity disc too smallD．Viscosity of oil little lower than normal

[单选题]（） water is more expensive than fresh water It has high specific heat and low viscosity.A . DistilledB . DistillingC . BoilingD . Boiled

[问答题]The doctor told me to have more water.

[问答题]The doctor told me to have more water.

[问答题]The doctor told me to have more water.