單項選擇題

Suppose the rated capacity of the main engine of a ship is 10,000 KW at 100 rated rpm, then when at 80 rpm its capacity should be （）.

A.800 KW
B.5120 KW
C.6400 KW
D.4180 KW

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Cylinder wall temperature, fuel oil supplier, and oil passage （）.

A.are interdependent
B.are not interdependent
C.have nothing to do with each other
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The development of oils （） the increasing demands made by the steady rise in powers produced by modem diesels.

A.has kept pace with
B.has kept pace to
C.has made pace with
D.has made pace to