A water jacket is placed around the exhaust manifolds of propulsion diesel enginesto( ).A.reduce heat radiation to the engine roomB.aid in preventing turbocharger overheatingC.condense and drain moisture from exhaust gasesD.dampen exhaust gas pulsations i

本句意思：“我们的计划不允许出错。”margin和room表示空间或者余地，例如：There's lots of room to express yourself creatively．有很多让你展现创意的机会。house: 房间，例如：a beautifully decorated house装演典稚的房子。place：地方，例如：In the spring the place is crowded with skiers．春季这地方满是滑雪者。account：记述，报告，例如：Your account of events does not correspond with hers．你对事情的陈述与她说的不相符。