正确答案: A

TDC

题目：During working, when the piston is near the （）, the air ignites the fine spray of fuel.

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学习资料的答案和解析：

[单选题]将主轴颈下沉量视为主轴承下瓦的磨损量是由于（）。

忽略曲轴主轴颈的磨损量

[单选题]为了检验螺旋桨的螺距应计算出（）。Ⅰ.局部螺距；Ⅱ.螺旋桨总螺距；Ⅲ.截面螺距；Ⅳ.桨叶平均螺距；Ⅴ.螺旋桨总平均螺距。

Ⅰ＋Ⅲ＋Ⅳ＋Ⅴ

[单选题]As a heat engine,（） energy is the source of power by which the diesel engine can be operated.

heat

[单选题]The gudgeon pin is carried in （） in the piston skirt.

bosses

[单选题]In a simple mechanical governor, the （）.

flyweight centrifugal force is balanced by spring force