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多项选择题

根据中心地理论，与中心地商品和服务的需求门槛、利润和服务范围密切相关的因素包括（）。

A．中心地规模
B．中心地人口分布密度
C．中心地居民收入水平
D．中心地商品和服务
E．中心地政治区位

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单项选择题
M：Hello，I’m Jimmy Tang，and I have a reservation．May I have it now? And I am so tired．
W：Yes，we have your reservation．You reserved a standard single room，didn’t you? Here is your key．
Q：Who most probably is the woman?（）

A．The casher of the hotel.
B．The receptionist at the front desk.
C．The hotel operator.
D．The Bell Telephone operator.
单项选择题
There are four basic types of competition in business that form. a continuum from pure competition through monopolistic competition and oligopoly (商品供应垄断) to monopoly. At one end of the continuum, pure competition results when every company has a similar product. Companies that deal in commodities such as wheat or corn are often involved in pure competition. In pure competition, it is often the ease and efficiency of distribution that influences purchase.
In contrast, in monopolistic competition several companies may compete for the sale of items that may be substituted. The classic example of monopolistic competition is coffee and tea. If the price of one is perceived as too high, consumers may begin to purchase the other. Coupons and other discounts (折扣) are often used as part of a marketing strategy to influence sales.
Oligopoly occurs when a few companies dominate the sales of a product or service. For example, only five airline carriers control more than 70 percent of all ticket sales in the United States. In oligopoly, serious competition is not considered desirable because it would result in reduced revenue for every company in the group. Although price wars do occur, in which all companies offer substantial savings to customers, a somewhat similar tendency to raise prices simultaneously is also usual.
Finally, monopoly occurs when only one firm sells the product. Some monopolies have been tolerated for producers of goods and services that have been considered basic or essential, including electricity and water. In these cases, it is government control, rather than competition, that protects and influences sales.
Which of the following would be the best title for the passage?
A．Monopolies
B．The Commodity Market
C．The Competition Continuum
D．The Best Type of Competition
A.
B.
C.
D.
Which
E.Monopolies
B．The
F.The
G.The
单项选择题
杜能在《孤立国》中提出六种耕作制度，每种耕作制度构成一个区域，而每个区域都以城市为中心，围绕城市呈同心圆状分布，这就是著名的“杜能圈”，其中的第三圈是（）。

A．自由农作区
B．草田轮作区
C．谷物轮作区
D．畜牧业区
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