正确答案: A

excessive heat

题目：Heat energy is a source of power, but （） will cause damage to the engine.

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学习资料的答案和解析：

[单选题]气缸盖底面裂纹一般产生在底面阀孔边缘和阀孔之间，即有（）的部位。

应力集中

[单选题]目前国内外均以（S＋D）/2为测量点A制定臂距差标准，若在大于（S＋D）/2处的B点测量，则臂距差ΔB必定（）。

＞ΔA

[单选题]修船时，抽出艉轴后立即用湿草包填塞于艉轴承内，这是为了（）。

防止铁梨木产生裂纹

[单选题]A diesel engine is similar to a gasoline engine except that the former has no （）.

spark plug

[单选题]As to the piston cooling, of the following, which statement is not true?（）

The lower the piston cooling temperature is, the better it is

[单选题]If you are unable to stop a diesel engine by any other means，you should（）.

discharge a CO2 extinguisher in the air inlet