一人正对一竖立的平面镜站立,人的身体宽为a,两眼相距为b.欲使自己无论闭上左眼或 发布时间:2017-07-24 14:25 │ 来源:www.tikuol.com 题型:选择题 问题: 一人正对一竖立的平面镜站立,人的身体宽为a,两眼相距为b.欲使自己无论闭上左眼或右眼都能用另一只眼从镜中看到自己的整个身体,镜子的宽度至少应为( )
题型:选择题 Swimming in the pool with friends _________ very interesting. [ ]A. has B. have C. is D. are 查看答案