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单项选择题Question 18 A、Writers of his time had no means to protect their works. B、Possible sources of clues about him were lost in a fire. C、His works were adapted beyond recognition. D、People of his time had little interest in him. Q: Why does the speaker say parts of Shakespeare's life will remain a mystery? 详解:短文结尾处提到1666年伦敦的一场大火把很多重要文件烧毁了,而这些本来可能是了解莎士比亚的重要线索,因此莎士比亚的部分生活将永远不为人所知,故答案为B。

单项选择题已知是数域P中的一个数,而是的一个子空间,则,V的维数为( )