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目的:建立解毒泄浊I号颗粒中大黄素的含量测定方法。方法:薄层扫描法,展开剂:正己烷-乙酸乙酯-甲酸(30∶10∶0.5),检测波长440 nm。结果:大黄素在0.2~1.0μg范围内呈良好线性
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新课标下语文课堂教学应该怎样才能恰当运用信息资源搭建好预设与生成的桥梁呢?笔者认为可以这样尝试:精心预设,暗含生成;关注学习,做好舵手;灵敏把握,收放有度;大胆预设,合
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