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下列黄酮苷元具有旋光性的是A、黄酮B、黄酮醇C、二氢黄酮D、.....
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The word "primitive" in paragraph 4 is closest in.....
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具有燥湿化痰,祛风解痉功效的药物为A、半夏B、蕲蛇C、天南星.....
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专利是()。A、发明专利的简称B、实用新型专利的简称C、外观.....
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There is no doubt __________ Herbert is the most industrious student in our class..
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Which of the following would be author most proba.....
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