put one's foot down 坚决反对 This idiom is used to describe when someone takes a firm stand. They are determined to have things happen their way. This idiom is often used to describe when someone prevents something from happening
答：put out救火 put up装饰 put off“不知道“ put down放下详情>>
答：我想你应该是个大学生吧,如果你学过课程内容包括Excel、Powerpoint、Word等的话，你又只需要考过计算机一级，我建议你去考一级MS Office，它...详情>>
