题目8多选题
关于如下公式,说法正确的是: <img src="https://tihai-oss-cloud.itihey.com/img/7a264a2678bbaad34419e6270b77a3a8.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/ec75414e658ea3b1d600b159fba756fe.png">是通过光电门G1的平均速度B. <img src="https://tihai-oss-cloud.itihey.com/img/ec75414e658ea3b1d600b159fba756fe.png">是通过光电门G1的瞬时速度C. <img src="https://tihai-oss-cloud.itihey.com/img/180501a841d8179a622474f1a4833f43.png">是通过光电门G2的平均速度D. <img src="https://tihai-oss-cloud.itihey.com/img/180501a841d8179a622474f1a4833f43.png">是通过光电门G2的瞬时速度