正确答案: D

high heating value and low sulphur content

题目：The desirable properties or a marine fuel oil should include_______.

解析：D

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举一反三的答案和解析：

[单选题]白棕绳受潮后，强度比原绳降低约：()

1/4

[单选题]For the Wartsila 50DF, the complete combustion compared with the lean-combustion can decrease the following results ____ .①Exhaust temperatures ②NOx emissions ③Propeller efficiency ④Output ⑤Cylinder knocking ⑥Fuel supply

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