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简述20世纪以后教育改革和发展的新特点。
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strictness
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【单选题】Every patient hopes to get good medicine which can ______ marvelously quick results.
A.
have
B.
yield
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bring
【简答题】Identify each of the following compounds. a. A gas with a sweetish odor that promotes the ripening of green fruit. b. An unsaturated compound of the formula C7H8 that gives a negative test with bromin...
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