简述炉温受哪些因素的影响？
White smoke exhausting from an operating diesel engine may indicate （）. ["a cracked liner","burning lube oil","an overloaded engine","insufficient combustion air"]
A seaman dies during a voyage. What is NOT required to be entered into the Official Log? （） ["Statement that the Master has taken custody of the deceased's MMD and passport","An inventory of the money and property","Statement of the wages due","Statement as to the total deductions to be made from the wage"]
什么叫密集型渠道。
用离心法测定原油含水率，首先应（）。 ["除去游离水","加无水化验汽油","加1~2滴破乳剂","预热30mi"]
炼焦煤料中的硫在炼焦与炼铁中有什么害处？
