题目7单选题
小米拍摄了一段校园视频,使用剪映电脑版软件把开头30秒内容删除,请问运用以下( )按钮能够实现A. <img src="https://tihai-oss-cloud.itihey.com/img/32f75afa3a8312d99ac41b9dc3632dd6.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/998dbd0b11951428afcff4e1bed589a9.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/31cf1865df3bba65a1ad515db34ad2ee.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/108e9d4a0185b9f8fbd6c2708259bfe8.png">