正确答案: B

300 tons of 180 cst fuel oil

题目：A: Please tell me the specifications and quantity.B: （）

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学习资料的答案和解析：

[单选题]Pistons of marine medium speed diesel engines may be made of （） in order to keep the weight down for balancing purpose at high speed.

aluminum alloy

[单选题]The cylinder and piston must be warmed up （） to a temperature of about 140 degF in standing by engine.

gradually