题目8单选题
下列函数中,当<img src="https://tihai-oss-cloud.itihey.com/img/d41514b131aac00f7d3d664fe9f59b68.png">时,是无穷小的是( )A. <img src="https://tihai-oss-cloud.itihey.com/img/b662e0f3e3d3683a2e1052bb4d47bb6f.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/3414d9e08f1bbf5a334968deb1bb05da.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/9f7df8b2ce3d57a45c74c120194afcd6.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/457b9b1935f217e42ecca9389120daea.png">