Here some oil in the oily water separator, as a result of its lower （）, will separate and rise into the oil collection space.<br>A:temperature<br>B:viscosity<br>C:density<br>D:velocity

Here some oil in the oily water separator, as a result of its lower （）, will separate and rise into the oil collection space.
A:temperature
B:viscosity
C:density
D:velocity

出自：海船船员证

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