[单选题]Factor influencing the position of the interface between the liquid seal and the oil in a purifier is （）.

正确答案 ：D

None of the above is wrong

[单选题]The development of （） has kept pace with the increasing demands made by the steady rise in power produced by modem marine diesels.

正确答案 ：C

oils

[单选题]The gas loads on the engine structure are constrained by means of hydraulically preloaded （） which connect the bed plate, frame sections and cylinder jackets into a single unit.

正确答案 ：D

tie rod

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