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【单选题】
The advantage of using computers is that computers can______.
A.
be more efficient at the busiest hours
B.
help people cash money conveniently
C.
return goods to suppliers
D.
replace efficient employees for the personnel management
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【单选题】Which of the following is a true statement?
A.
Since 1866, use of the metric system in the U.S. has been increasing.
B.
Since 1988, the metric system has been the preferred system of weights and measures for U.S. trade and life.
C.
In 1988, Congress passed a law to prevent the use of the Customary System in trade and commerce.
D.
On Dec. 23, 1975, Pres. Gerald R. Ford signed the Metric Conversion Act of 1975 to adopt the metric system in the U. S.
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A.
叶绿体
B.
质体
C.
结晶体
D.
线粒体
E.
高尔基体
【单选题】国民党政府解散中国民主同盟的真正原因是( )
A.
民盟反对国民党的内战独裁
B.
民盟与共产党一起组织武装,共同参加人民解放战争
C.
民盟企图推翻国民政府,取代国民党在中国的统治地位
D.
国民党发动的内战进展顺利,民盟已没有利用价值
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A.
Y
B.
N
C.
NG
【单选题】在燃气轮机真实工作过程中,采用下列哪个回热度条件,热效率最大( )。
A.
µ = 0
B.
µ = 0.5
C.
µ =1. 0
D.
µ =2. 0
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