节气门调整不当，不能全开，导致发动机进气不足。
A. 对
B. 错
What are the two speakers mainly talking about?
A. Ordinary people who risk their life for others.
B. Ordinary people who make a change in the world.
C. Ordinary people who do remarkable things.
D. Ordinary people who have super power.
Where do the speakers learn about those heroes?
A. From a newspaper.
B. From a magazine.
C. From a radio program.
D. From a website.
What do we know about the father?
A. He has found his long lost son.
B. He was still looking for his son.
C. He is working in Russia now.
D. He asked the villagers for help.
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