题目内容：
打开Word文档，修改后另存为文档B，则文档A（ ）。
A．被修改未关闭 B．被修改并关闭
C．未修改被关闭
D．被文档B覆盖
参考答案：
答案解析：
单选题：打开Word文档，修改后另存为文档B，则文档A（ ）。
- 题目分类：公共基础知识
- 题目类型：单选题
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B．被修改并关闭
C．未修改被关闭
D．被文档B覆盖
B．被修改并关闭
C．未修改被关闭
D．被文档B覆盖
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一个盲角三角形的三条边分别是3厘米，4厘米，5厘米(如图)，如果以它的最长边为轴旋转一周，求旋转后所形成图形的体积．(π
一个盲角三角形的三条边分别是3厘米，4厘米，5厘米(如图)，如果以它的最长边为轴旋转一周，求旋转后所形成图形的体积．(π取3计算)