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患者,男,59岁。吐血,血色黯淡,大便漆黑稀溏,面色苍白,.....
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高压与高压同杆架设时,转角或分支横担距下横担应为()mm。A......
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The______between the two posts measures thirty mete.....
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短气A.自觉呼吸短促而不相接续,不足以息B.呼吸微弱而声低,.....
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When the______fabric is contrasted with the natural one, the difference is very apparent.A..
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Scientists have known how to harness the limitless power of the sun. The underlined part m..
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