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若函数区间上连续,则在区间上函数一定存在最大值和最小值的是( )

单选题
2021-07-17 23:18
A、<p class="MsoNormal"><img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/152937524406100a3df528e6b4e1689d15959f14283be.png" alt="上传图片"></p>
B、<p class="MsoNormal"><img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15293752522704e6eb5b982694de99a60127a04d01a2d.png" alt="上传图片"></p>
C、<p class="MsoNormal"><img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1529375261145e36b7951b328454cbdc52ecd6543ffea.png" alt="上传图片"></p>
D、<p class="MsoNormal"><img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1529375267714a5d82b384ff041769cb95b9231afc18e.png" alt="上传图片"></p>
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正确答案
B
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