— did you go?
—I went to Beijing with my parents.
A:What
B:Where
C:How
关于现代生物技术相关知识的叙述,正确的是
在平面直角坐标系中,平行四边形ABOC如图放置,点A、C的坐标分别是(0,4)、(﹣1,0),将此平行四边形绕点O顺时针旋转90°,得到平行四边形A′B′OC′.