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下列物质中标准摩尔生成焓为零的是
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According to Text A Work Labor and Play, what are the definitions of “Labor”, “ Play “and “Work”.Labor is all about the ________ and no _______.Play is all about _________ and no _______.Work is where _________ and ________ are met.
What are the two consequences brought by technology and labor division?-They eliminate the need for ________ and turn enjoyable work into ________.- They increase _________ and reduce __________.
There are no equivalent in modern society in those aggressive amusements such as hunting, gambling, dueling and warfare, which were performed by the aristocracy in the past to kill time.
Industrial revolution can almost free humans from work.
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