A 0 B 1 C 2 D -1 E -2

A 存在但不连续 B 不存在 C 存在且连续 D 无穷大 E 以上选项均错误

A 1条垂直渐近线，1条水平渐近线 B 1条垂直渐近线，2条水平渐近线 C 2条垂直渐近线，1条水平渐近线 D 2条垂直渐近线，2条水平渐近线 E 3条垂直渐近线，1条水平渐近线

A <img src="https://www.beizhujiaoyu.com/uploads/202208/164534093842381.png" width="71" height="37" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/164534094314831.png" width="71" height="36" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/164534095970681.png" width="71" height="36" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/164534096447581.png" width="71" height="36" /> E <img src="https://www.beizhujiaoyu.com/uploads/202208/164534096866261.png" width="71" height="37" />

A 0 B 1 C -1 D <img width="16" height="29" src="https://www.beizhujiaoyu.com/uploads/202208/20220317162301_4611.jpg" /> E 2

A <img width="16" height="36" src="https://www.beizhujiaoyu.com/uploads/202208/20220216095609_5560.jpg" title="" align="" alt="" /> B 2 C 1 D -1 E -2

A 12!． B 11!． C 10!． D 0． E 12．

A 2 B 4 C -4 D -1 E 1

A x=1是f(x)的极值点，但(1，0)不是曲线y=f(x)的拐点 B x=1不是f(x)的极值点，但(1，0)是曲线y=f(x)的拐点 C x=2是f(x)的极值点，且(2，0)是曲线y=f(x)的拐点 D x=2不是f(x)的极值点，(2，0)也不是曲线y=f(x)的拐点 E x=1不是f(x)的极值点，(2，0)也不是曲线y=f(x)的拐点

A 2e B <img src="https://www.beizhujiaoyu.com/uploads/202208/164439418920381.png" width="24" height="33" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/164439419491621.png" width="37" height="33" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/164439419839231.png" width="24" height="33" /> E <img src="https://www.beizhujiaoyu.com/uploads/202208/164439420596201.png" width="37" height="33" />