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【单选题】
现在的汽油机的怠速稳定转速比过去有所提高,其目的是( )A.
、可相应提高发动机的额定转速,增加功率
B.
、可使发动机加快热起
C.
、可使怠速时使用较稀的混合气,减少C排气污染
D.
、减少燃料消耗
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举一反三
【单选题】The end sentence of the article is to ______.
A.
emphasize the importance of love
B.
explain how people love each other
C.
show why lovers exchange rings
D.
tell a story of rings in the universe
【单选题】The author's intention in writing the article is to make Americans realize that ______.
A.
it is dangerous to ignore their foreign friends
B.
it is important to maintain their leading role in world affairs
C.
it is necessary to use several languages in public places
D.
it is time to get acquainted with other cultures
【简答题】The purpose of the article is to explain_________
【单选题】The purpose of the article is to draw public attention ______ the problem.
A.
to
B.
on
C.
in
D.
for
【单选题】The aim of the article is to _____.
A.
show how to use smart cards.
B.
show the difference between ATM card and chip card.
C.
how the smart cards have become popular.
D.
persuade Americans to use smart cards.
【单选题】The purpose of the article is to tell us ______.
A.
the effect of antibiotics
B.
not to use antibiotics unless necessary
C.
that antibiotics are harmfull
D.
that our natural defence systems are superior to antibiotics
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