问题 
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              Why does the author quote the example of naturalist John Muir?A.Because he was one of the 
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              The author gives the example of "entertainer" visas to show thatA.how important entertainm 
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              The author quotes the example of Straus in Para. 4 to showA.the whole process of applying 
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              The author quotes the example of our ancestors to show that education emerged ________ 
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              The author gives an example of laptop in order to 
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              By quoting the growing percentage points of the aged in the population the author seems t 
 
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