假如甲国使用同样数量的资源比乙国生产出更多的彩电,那么,甲国在彩电的生产上具有____。
在绝对成本贸易模型和相对成本贸易模型中,当边际成本不变时,贸易参加国可实行____专业化分工。
用标准输入流对象cin与提取操作符>>连用进行输入时，将（）与（）当作分隔符，使用（）成员函数进行输入时可以指定输入分隔符。
It is indicated in Paragraphs 1 and 2 that
A. [A] arts criticism has disappeared from big-city newspapers.
B. [B] English-language newspapers used to carry more arts reviews.
C. [C] high-quality newspapers retain a large body of readers.
D. [D] young readers doubt the suitability of criticism on dailies.
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