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【单选题】
[单选,B1型题] 当归头中含量较高的成分是（）
A.
钙 . 铜 . 锌
B.
阿魏酸
C.
结合型蒽醌
D.
游离型蒽醌
E.
小檗碱
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】What is the main aim of book review? （单选）
A.
analyzing a perspective or argues a point
B.
analyzing or discussing researches previously published by others
C.
summaries and comments on a newly published academic book
D.
summaries, reviews and comments the research trends, the major discoveries, significant findings, the leading opinions on a particular subject.