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In December 1997, a United Airlines flight hit une
2007-12-12
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Please Fasten Your Seatbelts Severe turbulence （湍流） can
2008-03-06
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Which of the following statements is NOT true, acc
2007-12-12
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Which country is the largest coffee producer?
2007-12-12
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Thousands of Irish people starved during the “Potato&nb
2007-12-12
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“Some” in the last sentence of the first paragraph
2007-12-12
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New Foods and the New World In the last 500
2008-03-06
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The use of robots increases ___________.
2007-12-12
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One disadvantage of using robots is that they cons
2007-12-12
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Robots are less popular in Britain today partly be
2007-12-12
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Even the most sophisticated Japanese robots are _______
2007-12-12
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Paragraph 6 _____________
2007-12-12
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Paragraph 5 _____________
2007-12-12
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Paragraph 3 _____________
2007-12-12
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Robots1 The most sophisticated（先进的）Japanese robots, which ha
2008-03-06
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Some industrialized countries are unwilling to spend mo
2007-12-12
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The people of the coral island nations are unable to do anything substantial about the pro
2007-12-12
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The coral island nations of the Pacific have a&nbs
2007-12-12
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Scientists are not sure how serious the effects of
2007-12-12
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理工类
The heat released by burning oil and coal is
2007-12-12
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