题目内容：
大黄的采收时间是( )。
参考答案：
答案解析：
单选题：大黄的采收时间是( )。
- 题目分类：中药学专业知识(一)
- 题目类型：单选题
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《中国药典》规定冰片（合成龙脑）所测定的物理常数是( )。
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