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【单选题】
听力原文：W: What are you going to do this afternoon? M: I told Frank I' d help him work on his car. Q: What did the man plan to do? (16)A.
To buy Frank a new car.
B.
To drive Frank's car.
C.
To help Frank sell his car.
D.
To help Frank repair his car.
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举一反三
【单选题】Which of the following Herfindahl–Hirschman indices is most likely to indicate a perfectly competitive market?
A.
100
B.
1,800
C.
10,000
D.
100,000
【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
【单选题】在寡头垄断市场,Herfindahl-Hirschman指数通常是:
A.
大于1,800
B.
低于1,000
C.
介于100和1,000之间
D.
200到2,000之间
【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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