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【单选题】
All of the following statements regarding profit margin are true except:A.
Profit margin reflects the percent of profit in each dollar of revenue.
B.
Profit margin is also called return on sales.
C.
Profit margin can be used to compare a firm's performance to its competitors.
D.
Profit margin is calculated by dividing net income by net sales.
E.
Profit margin is not a useful measure of a company’s operating results.
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举一反三
【单选题】( ) can be used by a group of persons traveling together.
A.
single rooms
B.
double rooms
C.
suites
D.
standard rooms
【单选题】A class is said rather vaguely to ______a group of persons sharing similar occupations and incomes, and as a consequence similar life-styles and beliefs.
A.
consist of
B.
contrast with
C.
contribute in
D.
composed of
【简答题】我国于1998年公布了“国家危险废物名录”其中包括（）个类别，175种废物来源和约（）种常见危害组分和废物名称。
【单选题】竖向结构(墙、柱等)浇筑混凝土前，底部应先填( )厚的与混凝土内砂浆成分相同的水泥砂浆。
A.
10～30mm
B.
30～50mm
C.
50～100mm
D.
50～70mm
【简答题】药膳配伍是将两种以上的药膳原料按一定原则配合运用,以达到 的目的。
【单选题】A group of young Americans have come to Beijing for a visit. Half of them, ___is, 50 persons, can speak Chinese fluently.
A.
that
B.
which
C.
who
D.
it
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