题目5单选题
<img src="https://tihai-oss-cloud.itihey.com/img/39eae2e89a2670b5d67746aabe012050.webp">A. <img src="https://tihai-oss-cloud.itihey.com/img/0944f1159cd3933fb6aa55f342f80629.webp">是奇函数,且是有界函数B. <img src="https://tihai-oss-cloud.itihey.com/img/0944f1159cd3933fb6aa55f342f80629.webp">有两个极值点C. <img src="https://tihai-oss-cloud.itihey.com/img/0944f1159cd3933fb6aa55f342f80629.webp">只有一个拐点D. <img src="https://tihai-oss-cloud.itihey.com/img/0944f1159cd3933fb6aa55f342f80629.webp">只有一条水平渐近线