题目内容

请根据下列场景,编写一段对话Situation: Marry Wang came to China by air. Shecame to the counter of immigration. Marry told the clerk that she came to China for sightseeing. She would stay in China for two weeks. She would stay at Garden Hotel and she had 1000 dollarswith her.

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随着发动机转速的上升,点火提前角:

A. 减小
B. 增大
C. 不变
D. 不影响

随着发动机负荷的增加,点火提前角:

A. 减小
B. 增加
C. 不变
D. 不影响

点火提前角正常应为:

A. 8-10度
B. 10-15度
C. 15-20度
D. 16-18度

初级线圈通电时间和闭合角是完全不同的两个概念,不可混为一谈。

A. 对
B. 错

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