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【单选题】
在Word2010的编辑状态打开一个文档，并对文档进行修改，然后“关闭”文档操作后( )。A.
文档将被关闭，但修改后的内容不能保存
B.
文档不能被关闭，并提示出错
C.
文档将被关闭，并自动保存修改后的内容
D.
将弹出对话框，并询问是否保存对文档的修改
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