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单选题
2021-07-17 18:28
A、<p><span style="font-size:14px;font-family:宋体">连续点</span></p>
B、<p><span style="font-size:14px;font-family:宋体">第一类间断点</span></p>
C、<p><span style="font-size:14px;font-family:宋体">第二类间断点</span></p>
D、<p><span style="font-size:14px;font-family:宋体">不能由此确定连续点或间断点</span></p>
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正确答案
B

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