[单选] If the diesel engine fuel injection timing is changed to delay the start of injection until the pistons are at top dead center, the engine will（）

提高蜗杆传动效率的最有效方法是（）。 增加蜗杆头数。 增加直径系数。 增大模数。 减小直径系数。 CIM模型中，一个端点（Terminal）可以关联两个连接点（ConnectivityNode）。 If at any time the officer in charge of the navigational watch is to be relieved when a manoeuvre or other action to avoid any hazard is taking place,（）. the relief of that officer shall be made prior to such action has been completed。 the relief of that officer shall never be made。 the relief of that officer shall be deferred until such action has been completed。 the relief of that officer shall be made by the captai。 罗茨流量计的工作原理是当被测介质流经流量计时，在流量计进、出口形成压力差，此压力差推动罗茨转子旋转，当转子、计量室结构尺寸一定时，其排出介质的体积与转子的转速成（）。 正比。 反比。 负比。 不相关。 领导者在考察识别人才时必须坚持（）。 抽象的、宏观的、现实的观点。 全面的、历史的、发展的观点。 长期的、直接的、具体的观点。 综合的、微观的、有用的观点。 If the diesel engine fuel injection timing is changed to delay the start of injection until the pistons are at top dead center, the engine will（）