垄断竞争市场上，厂商就长期而言不能获得超额利润,原因在于（）
A. 厂商生产的产品之间有一定差别
B. 厂商花费的广告费用太高
C. 厂商的行业进出比较容易
D. 厂商倾向于采用非价格竞争手段
查看答案
最需要进行广告宣传的市场是:()
A. 垄断竞争市场
B. 完全竞争市场
C. 寡头市场
D. 完全垄断市场
The first English permanent settlement was founded in California.
A. 对
B. 错
By the early 1760s, the 13 English colonies in North America were ready to separate themselves from Europe.
A. 对
B. 错
Which of the following American values did NOT come from Puritanism?
A. separation of state and church
B. respect of education
C. individualism
D. hard work
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