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补骨脂中所含香豆素属于简单香豆素。()

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According to paragraph. 1, which of the following is true？

A. Bookstores are going out of fashion because of e-books and e-tailers.
B. Digital books are likely to sell better than paper ones before 2015 in USA.
C. Bookstores are facing an existential crisis because of insufficient time.
D. The future of Foyles has become the primary concern of everyone.

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补骨脂中所含香豆素属于简单香豆素。()

婚姻法调整的财产关系不存在等价、有偿。()

简述施工现场安全管理的基本要求

两相溶剂萃取法的原理是利用混合物中各成分在两相溶剂中的分配系数不同。()

According to paragraph. 1, which of the following is true？