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【单选题】
若已知柴油机气缸工作容积为Vs、压缩容积为Vc及总容积Va,则压缩比为A.
=Vs/Vc
B.
=1+Va/Vc
C.
=1-Vs/Vc
D.
=1+Vs/Vc
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【简答题】初级市场(primary：market)
【简答题】初级市场(primary market)
【简答题】英译汉:I need to send a letter.
【单选题】The primary solution to environmental problems is ______.
A.
to allow market forces to operate properly
B.
to control consumption of natural resources
C.
to limit the growth of the world population
D.
to avoid fluctuations in prices
【单选题】Which of the following terms is not mentioned in the passage?
A.
Primary market and secondary market.
B.
Securities exchange and the over-the-counter market.
C.
Investment-banking firm and stock averages.
D.
The New York Stock Exchange and Nasdaq.
【单选题】The primary assets of money market mutual funds are
A.
stocks.
B.
bonds.
C.
money market instruments.
D.
deposits.
【简答题】箭头所示结构为 ,框内为何种上皮
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