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【多选题】
属于蒽醌类化合物的是A.
紫草素
B.
丹参醌甲
C.
大黄素
D.
五味子素
E.
茜草素
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反馈参考答案：
举一反三
【简答题】体内药物分析中去除蛋白质的方法为（）。
【单选题】Nurturing societies as mentioned in the passage refer to societies that _________.
A.
enforce strong discipline on students who want to achieve excellence
B.
treasure talent and provide opportunities for its full development
C.
encourage people to complete with each other
D.
promise talented children high positions
【单选题】Which of the following helps criminals easily obtain our personal data?
A.
The strict enforcement of immigration laws.
B.
The printing of the Social Security numbers.
C.
The proliferation of computer operation jobs.
D.
The mishandling of used computer backup tapes.
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