问题
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An advantage of a helical gear pump over a simple gear pump is that the helical gear pump
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According to the professor, what is the primary advantage of spectroscopy over other labor
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What does the man think is the advantage of subway over bus?A.The price and speed.B.The pr
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Which of the following is the best title of the passage?A.Apple"s Shadow Hangs over Game C
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The following are the frustrations Philips meet EXCEPTA.concerns over the quality of the s
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Actually, over 60 percents of the world s 580 million older people live in developing coun
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