一共享单车公司对某路段停放的1000辆单车中脚踏板、轮圈、刹车三处的损坏情况进行统计，发现，其中有452辆脚踏板损坏，有377辆轮圈损坏，有131辆刹车损坏，至少2处损坏的有236辆，完好无损的单车有321辆，只有三处皆损坏的才需要返厂维修，请问有多少单车需要返厂维修？（ ）

(单选题)人们只有选择自律的生活方式，才能保持健康的身体；只有保持健康的身体，才能获得工作的成功。然而，只要选择了自律的生活方式， (单选题)请从所给的四个选项中，选择最合适的一项填在问号处，使之呈现一定的规律性：（ ） (单选题)I took mathematics and physics because I think that ( ) v (单选题)( ) for the fact that she broke her leg, she might have p (单选题)( ) your timely advice, I would never have known how to g (单选题)I don't like ( ) as you read. (单选题)Do you know the man ( )? (单选题)One of the men held the view ( ) the book said was right. (单选题)Have you seen Henry lately My boss wants to know ( ). (单选题)If you explained the situation to your solicitor, he ( )