单项选择题
在反手发旋转球时,如果引拍幅度不够,则会导致摩擦力不够,因此发球旋转低,同时易出现下网的情况。此时,应增大引拍的幅度。
In backhand spin serve, if the backswing is not enough, it will result in insufficient friction and less spin. Also, it’s easy to get off the net. At this time, the racket be fully back swung.
A、正确
B、错误