正确答案: D

higher compression pressures

题目：Diesel engine electric starting motors generally require heavier duty motors and motors and operate at higher voltages than comparable starting motors for gasoline engines due to _____________.

解析：D

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举一反三的答案和解析：

[单选题]若客船海水泵的动力源为电力时，则动力源为_____。

1套主发电机和1套应急电源

[单选题]柴油机气缸发生拉缸时的征兆是( )。Ⅰ.排温升高，冒黑烟;Ⅱ，转速升高;Ⅲ.柴油机冷却液出口温度升高;Ⅳ.曲轴箱，扫气箱温度升高。

Ⅲ+Ⅳ

[单选题]救生艇手提电台能自多少米投入水中不损坏且浮于水面：

15m

[单选题]If anything abnormal be found on the load change of main engine when the ship is entering in shallow waterway, before taking measures the engineer on duty should _______.

inquire the bridge for the situation initiatively

[单选题]在航不对水移动中从事疏浚作业的船舶，操纵能力受到限制时，在夜间应显示＿＿＿＿。

红、白、红垂直三盏环照灯

[单选题]增压器压气机采用半开式径向叶轮的优点是( )。

以上三点都是