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【单选题】
蛋白质功效比值是表示蛋白质的A.
消化率
B.
真实消化率
C.
利用率
D.
蛋白质含量
E.
净利用率
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【简答题】Jenny Bowen, an American living in Beijing, was selected as the only American to carry the 2008 Beijing Olympic torch on Chinese soil．She and seven other non-Chinese winners had been chosen from 262 a...
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B.
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C.
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D.
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【单选题】In April 1995, a young Chinese chemistry student at Beijing University lay dying in a Beijing hospital. She was in a coma, and although her doctors had performed numerous tests, they could not discove...
A.
international cooperation via the Internet
B.
how dangerous thallium can be to humans
C.
how one can get help from the Internet
D.
the girl's recovery from thallium poisoning
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