问题描述:
[单选]
The fuel injector injects a fine spray of fuel into the hot air and combustion(), producing much high pressure in the gases.
A.has begun
B.takes place
C.occurs
D.happe
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答案解析:无
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答案解析:无
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上一篇:The fuel injector pump is operated by()which drives the plunger up and down.
下一篇:The fresh air coming in through the inner air ports, is compressed by()to a higher pressure.
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