题目内容
请根据下列问题编写一段对话1. May I see your ticket, ID card and boarding pass?2. Would you please take off your sunglasses?3. Would you pleasetake off your mask?4. What’s your name / date of birth?5. How old are you?6. Where do you live?
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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.
随着发动机转速的上升，点火提前角：
随着发动机负荷的增加，点火提前角：
点火提前角正常应为：
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