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中药黄芩中的主要有效成分
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The United States has many different 1 of climates. 2 the west coast the temperature changes very little 3 summer and winter, but the north central states have a very different kind of climate. In those places people 4 light clothing during the summer and they need to have wool or fur clothing in winter. In the southwest the climate is pleasantly warm during the winter, 5 the summer is unpleasantly hot. In the eastern part of the United States summer temperatures are very different 6 winter temperatures. Summers are usually hot, but winters are usually cold. Spring temperatures are pleasantly cool. Years ago, people in the cold part of the United States 7 often get fresh vegetables and fresh fruits during the winter. Today, 8 , trucks and trains carry fruits and vegetables very quickly to all parts of the United States. In this 9 , Americans "send their climates" to people in 10 states.
企业所有者作为投资人，关心其资本的保值和增值状况，因此较为重视企业的______。
A.格列吡嗪 B.氯磺丙脲 C.阿卡波糖 D.苯乙双胍 E.罗格列酮 在强心苷的化学结构中含羟基最少的药物是 。
A.格列吡嗪 B.氯磺丙脲 C.阿卡波糖 D.苯乙双胍 E.罗格列酮 氯丙嗪导致的药物中毒性低血压的治疗药物是
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