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【单选题】
半砖厚的标准墙,计算工程量时,墙厚取值为()A.
75
B.
105
C.
115
D.
120
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反馈参考答案：
举一反三
【单选题】In an oligopoly market, the Herfindahl-Hirschman Index is usually:
A.
Greater than 1,000.
B.
Below 1,000.
C.
Between 100 and 1,000.
D.
Between 200 and 2,000.
【单选题】The _____ the Herfindahl-Hirschman Index, the ____ the industry.
A.
higher; less competitive is
B.
lower; less competitive is
C.
higher; the greater is the number of firms in
D.
lower; more profitable is
【单选题】Whenever any firms in a concentrated industry merge, the Herfindahl-Hirschman Index:
A.
will rise.
B.
may rise or stay the same.
C.
may rise or fall.
D.
will fall.
【简答题】多项式 的次数是 ，最高次项的系数是 。
【单选题】下列说法正确的是（ ）
A.
1 3 πx 2 的系数是 1 3
B.
-2πx 2 y的次数是3，系数是-2π
C.
x 2 y的系数是0
D.
3x 2 y的次数是2，系数是3
【判断题】If Herfindahl index of a market is lower, the market becomes less concentrated and more competitive.
A.
正确
B.
错误
【单选题】The largest Herfindahl–Hirschman index possible is _____, and the industry is a(n) _____.
A.
10; monopoly
B.
10,000; monopoly
C.
100,000; monopoly
D.
100,000; oligopoly
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