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【单选题】
学生a说,柱塞式喷油泵中的下置右旋直切槽柱塞,工作供油开始时刻不变,用改变供油终了时刻来改变供油量。学生b说,这种直切槽柱塞,工作供油终了时刻不变,用改变供油开始时刻来改变供油量。他们说法正确的是( )A.
只有学生a正确
B.
只有学生b正确
C.
学生a和b都正确
D.
学生a和b都不正确
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A.
Iraq war.
B.
Economy.
C.
Health care.
D.
Gay marriage.
【简答题】撤销的快捷键
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D.
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A.
leave him in a disadvantaged position in the campaign
B.
result in a draw against President Bush in the campaign
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【单选题】A four-year 6% semiannual coupon payment corporate bond is priced at 110 per 100 of par value. Its yield to maturity is 7.87%, quoted on a semiannual basis. The annual rate of the bond that can be use...
A.
7.79%
B.
8.02%
C.
15.74%
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