在自动起动过程中，当N3达到多少时FADEC控制进行点火？（）
A. 7%
B. 10%
C. 15%
D. 25%
查看答案
As an extinguishing agent,foam（）.
A. couducts electricity
B. should be directed at the base of the fire
C. is most effective on burning gases which are flowing
D. extinguishes by cooling oil fires blow ignition temperature
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