单项选择题
The diameter of the gravity disc is too big It causes oil to flow through the water outlet We changed the disc and no （） is found in the water outlet.
A.water
B.oil
C.scale
D.ridge
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A.water
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The design of the connecting rod large end bearing is similar to that of the mainbearings Whats the meaning of "that" in the sentence above?（）
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B.large end bearing
C.the main bearing
D.the design
