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阅读下面XML文档,下列说法正确的是______。<book><author>tony</author><!--作者信息--><bookcode>97873022</book>
A.<book>是元素对象,同样也是数据内容
B.<author>是数据内容
C.<!--作者信息-->是元素对象
D.97873022是数据内容
B.<author>是数据内容
C.<!--作者信息-->是元素对象
D.97873022是数据内容
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参考解析
解析:依题意,book、author、bookcode都是元素标记名称;tony、97873022是元素的数据内容。
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