单选题When started, a complete oily water separating unit is first filled （）The oily water mixture is then pumped through the inlet pipe into the coarse separating compartment.Awith dirty waterBwith clean waterCby oily waterDby mixed water
单选题
When started, a complete oily water separating unit is first filled （）The oily water mixture is then pumped through the inlet pipe into the coarse separating compartment.
A
with dirty water
B
with clean water
C
by oily water
D
by mixed water
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