相关考题
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单项选择题
汽油机燃料供给系的作用是根据发动机各种不同工况的要求，将洁净的汽油或汽油和空气配制出适当浓度的混合气，按一定的时间和数量供入( )。
A.化油器
B.气缸
C.喷油器
D.油泵 -
单项选择题
(), the number of private cars will increase sharply in the coming couple of years.A. UndoubtedlyB. DoubtedlyC. Undoubted
A.
A. -
单项选择题
We can certainly deliver high-quality education to many students at much()cost.A. lowB. lowestC. lower
A.
A.
