What does the author mean by the statement "Although price wars do occur, in which all companies offer substantial savings to customers, a somewhat similar tendency to raise prices simultaneously also usual"？
A. It is not unusual for all companies to increase prices at the same time.
B. It is common for companies to compete for customers by lowering prices.
Customers may lose money when companies have price wars.
D. Prices are lower during price wars, but they are usually higher afterward.
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How is slang defined by the author？
A. Words and phrased accepted by the majority for formal usage.
B. Words and phrased understood by the majority but nor found in standard dictionaries.
C. Words and phrased that are understood by a restricted group of speakers.
D. Words and phrases understood by a large number of speakers but not accepted as formal usage.
An example of a product in monopolistic competition is ______.
A. corn
B. electricity
C. airline tickets
D. coffee
Western scholars generally recognize two main kinds of riddle: the descriptive riddle and
A. shrewd
B. absurd
C. controversial
D. exhilarating
预提费用账户的余额一般在贷方,如果在借方则表示待摊的费用。()
A. 正确
B. 错误
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