如果在泵中发现金属颗粒，找到它们的来源并修复有缺陷的部分。( )
A.If you find metal particles in the reservoir,find their source and repair the broken part, B.If you find metal particles in the pump,find their source and repair the defective part. C.If you find material particles in the pump,find their source and repair the damaged part.正确答案B
