[单项选择]If an oligopoly is characterized by fierce competition, in long-run equilibrium the firms in the market will earn:（）
A. zero economic profits.
B. substantial economic losses.
C. substantial economic profits.

[单项选择]An oligopoly is characterized by all of the following EXCEPT:（）
A. large economies of scale.
B. significant barriers to entry.
C. a large number of sellers.

[单项选择]It is known that everyone ______ from free competition.
A. profits
B. gets
C. benefits
D. gains

[单项选择]The demand curve for a firm in a perfectly competitive market is:（）
A. upward sloping.
B. vertical.
C. horizontal.

[单项选择]It is implied that cloning draws fierce criticism from ethicists, religious leaders and US President Bush because______.


A. it is conceptually hyped
B. it is morally controversial
C. it is extremely difficult
D. it is not scientifically viable

[单项选择]There are fierce competitions among the airlines.
A. intense
B. strained
C. eager
D. critical

[单项选择]The Canadian population is chiefly characterized by ______.
A. its size
B. its growth
C. its linguistic duality
D. its French origins

[单项选择]Many politicians are characterized by an inconsistency of platform during crises, to the extent that they are rarely ______ encouraging and ______similar behavior in their colleagues.
A. (A) averse to … facilitating
B. (B) abhorrent of … foreshadowing
C. (C) confident about … dissuading
D. (D) diffident in … triggering
E. (E) radical about … quelling

[单项选择]

Text 4
Penny-pinching consumers and fierce price wars are bad news for the travel industry. Bad, that is, for everyone except the booming online travel giants. Consider the sharp rebound of such online players as Travelocity and Expedia. While they suffered in the wake of the September 11 terrorist attacks, with bookings off as much as 70%0 in the weeks that followed, business has snapped back. "The speed with which those businesses bounced back surprised even the people most bullish about the sector," says Mitchell J. Rubin, a money manager at New York-based Baron Capital, an investor in online travel stocks.
The travel industry’s pain is often the online industry’s gain, as suppliers push more discounted airline seats and hotel rooms to win back customers. And many of those deals are available only online. At the same time, online agencies rely primarily on leisure travelers, where traffic has rebounded more quickly than on the busin
A. skeptical.
B. doubtful.
C. optimistic.
D. shocked.

[单项选择]The argument between the two boys became so fierce that father had to ______ and tell them to behave.
A. interpret
B. intervene
C. inherit
D. impart

[单项选择]

Text 1
Penny-pinching consumers and fierce price wars are bad news for the travel industry. Bad, that is, for everyone except the booming on line travel giants. Consider the sharp rebound of such on-line players as Travelocity and Expedia. While they suffered in the wake of the September 11th terrorist attacks, with bookings off as much as 70% in the weeks that followed, business has snapped back. "The speed with which those businesses bounced back surprised even the people most bullish about the sector," says Mitchell J. Rubin, a money manager at New York-based Baron Capital, an investor in on-line travel stocks.
The travel industry’s pain is often the on-line industry’s gain, as suppliers push more discounted airline seats and hotel rooms to win back customers. And many of those deals are available only on dine. At the same time, on-line agencies rely primarily on leisure travelers, where traffic has rebounded more quickly than on th
A. skeptical.
B. doubtful.
C. optimistic.
D. shocked.

[单项选择]Competition is fierce and this is why American marketing methods have to be used to help British products compete．
A. 竞争是激烈的，这也是利用美国的营销策略来帮助英国竞争的原因。
B. 竞争是激烈的，这就是为什么要用美国的营销方法来帮助英国产品提高竞争能力。
C. 竞争是激烈的，这也是美同营销策略得以应用到英国产品竞争的原因。
D. 竞争是激烈的，这也是为什么要应用美国营销策略使英国生产参与竞争之中。

[单项选择]Other spots are characterized by their ability to modify or ______ sound, even to the point of audio saturation.


A. intensify
B. amplify
C. enlarge
D. reinforce

[单项选择]The United States court system is characterized by ______ hierarchies: there are both state and federal courts.
A. double
B. complex
C. simple
D. dual

[单项选择]

Both bus and tree topologies are characterized by the use of multipoint （） . For the bus, all stations attach, through appropriate hardware （） known as a tap, directly to a linear transmission medium, or bus. Full-duplex operation between the station and the tap allows data to be transmitted onto the bus and received fromthe （） . A transmission from any station propagates the length of the medium in both directions and can be received by all other （） . At each end of the bus is a （） , which absorbs any signal, removing it from the bus.

A transmission from any station propagates the length of the medium in both directions and can be received by all other （）.
A. routers
B. stations
C. servers
D. switches