题目比赛中当球在()击球就视为合法击球。A. .本方场区上空B. .对方场区低于球网C. .对方场区高于球网D. .本方场地,已落地比赛中当球在()击球就视为合法击球。A. .本方场区上空B. .对方场区低于球网C. .对方场区高于球网D. .本方场地,已落地题目解答答案A