A、<p><span style=\""font-size: 14px; font-family: 微软雅黑, 'Microsoft YaHei';\"">驻点一定是极值点<\/span><\/p>
B、<p><span style=\""font-size: 14px; font-family: 微软雅黑, 'Microsoft YaHei';\"">极值点一定是驻点<\/span><\/p>
C、<p><span style=\""font-size: 14px; font-family: 微软雅黑, 'Microsoft YaHei';\"">可导的极值点一定是驻点<\/span><\/p>
D、<p><span style=\""font-size: 14px; font-family: 微软雅黑, 'Microsoft YaHei';\"">不可导点一定不是极值点<\/span><\/p>