题目内容：
下列函数中，定义域为全体实数的是
A．
B．y=1/x
C．y=1/sinx
D．
参考答案：
答案解析：
单选题：下列函数中，定义域为全体实数的是
- 题目分类：文科数学
- 题目类型：单选题
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B．y=1/x
C．y=1/sinx
D．
B．y=1/x
C．y=1/sinx
D．
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