汽车排放的尾气中因含有氮的氧化物而污染大气。产生氮的氧化物的主要原因是

题干

A：燃烧含氮的化合物燃料引起的

B：燃烧含铅汽油引起的

C：是由燃烧不充分引起的

D：是在汽缸中N₂被氧化生成的

上一题下一题 0.0难度选择题更新时间:2019-06-11 08:10:55

STUDY ENGLISH IN AMERICA
Country	Tina comes from ____.
Weekend Activity	Tina visits____ on Sundays.
Location	Tina's host family is in a ____ area.
TV Program	Tina always watches ____ in the evening.
Study Time	Stay for ____ and study English as Tina does!