单项选择题As a matter of fact, Albert Einstein, known for his influential theory of relativity, found the most joy in his life had come from paintings. A.对B.错
单项选择题在双打比赛中,一名同伴发球次序出现失误,如果该局比赛在错误被发现时已经结束,那么发球次序能否按照一经和发生的变化来执行。A.对B.错