中国大学MOOC: What kind of friends are worth making?下列哪种朋友值得一交？
a friend in needa friendly neighbora work pala loyal friend
举一反三
内容
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中国大学MOOC: What kind of news is often the hard news?
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中国大学MOOC: 列车交路常见的有长交路、短交路及混合交路三种，下列交路图哪个属于单一交路？
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中国大学MOOC: What kind of Superman games did the children play?
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中国大学MOOC: What kind of emphatic device is used in the third sentence?
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中国大学MOOC: Pets are the best friends of people:宠物是人类最好的朋友：