题目3单选题
系统的传递函数为<img src="https://tihai-oss-cloud.itihey.com/img/84fea646c071a1bf473f69d3989bcd76.png">,则其频率特性为( )A. <img src="https://tihai-oss-cloud.itihey.com/img/76ca1379a3a7ea5906a1eec4ade17b7f.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/6bf81f8d34bf416322c1f909a8c6d5a3.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/42bfaf95723c8e1959e54472dd68c614.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/cf7f30ddc89a4739f25dbd0b99252b93.png">