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【判断题】
安全边际率=(预计销售量-保本销售量)/保本销售量。 ( )A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】It is the third year ____ that he keeps buying milk in glass bottles instead of plastic bottles.
A.
one by one
B.
one after another
C.
in a row
D.
in turn
【单选题】It is the third year that he______ in this rented studio.
A.
has worked
B.
is working
C.
works
D.
worked
【单选题】Revive Beverage Company (RBC) is considering buying new bottling equipment for its factories. It will take one year to order and install the equipment. The second year they will gain $2 million in r...
A.
4.85 million and 6%
B.
4.65 million and 7%
C.
4.35 million and 8%
D.
All of these combinations are profitable.
【单选题】For Ethiopia and Sudan, it is the second bad year _______ (and the third bad year in four).
A.
in turn
B.
in time
C.
in a row
D.
in the end
【单选题】It is his third ____ with the law in less than a year.
A.
meeting
B.
brush
C.
bush
D.
accident
【单选题】The first time I ________ here, it was the year of 1980; this is the third time that I _________ to Chongqing.
A.
came; had visited
B.
had come; visited
C.
came; have visited
D.
had come; have visited
【单选题】It is the third time that he ____ abroad on business this year.
A.
goes
B.
went
C.
has gone
D.
go
【简答题】为减少蒸汽中硅酸盐的含量，在运行中锅水应呈（），且其PH值最好维持在（）范围内。
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