This is the oil that has changed the life __8__of the common men.
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But when the politician or the engineer refers to oil, one almost always __7__
means mineral oil, the oil that drives tanks, aeroplanes and warships,motor-cars and diesel locomotives; the oil that is used to lubricate all kinds of machineries.
which has replaced the private horse-drawing carriage. __10__
中国革命胜利的基本经验是什么,这些经验对今天有何指导作用?