题目内容

哪项不是燃油供给系统常见检测项目？

A. 喷油波形检测，喷油器控制信号检测
B. 回油管和进油管畅通性检测
C. 电动油泵检测，油泵继电器检测
D. 喷油质量检测，燃油压力检测

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点火波形的重叠波主要用来分析点火系统的（）。

A. 各缸点火闭合角均匀性
B. 各缸点火提前角均匀性
C. 各缸点火火花电压均匀性
D. 各缸点火击穿电压击穿电压均匀性

发动机异响主要影响因素不包括()

A. 电压
B. 润滑条件
C. 温度
D. 转速

To help the listeners connect what they have heard with their own ideas and experience andmove from listening to another skill is () stage.

A. post-listening
B. pre-listening
C. while-listening
D. after-listening

Before listening, it's important to prepare students for listening. What activities can we use in pre-listening stage?

A. Predicting
B. Note-taking
C. Setting the scene
D. Inferring