单选题 The medical benefits of x - rays far______the risk of having them.
【正确答案】 D
【答案解析】解析：句意：X射线的医疗益处远胜过其危害性。outweigh重要性或价值上超过。outnumber数量山超过。outwit以机智胜过。outperform在操作或性能上胜过。