题目

阅读理解 We often find that weekends and holidays feel so short while classes and work feel so long. Actually, though, we know that this is not true. But we still wonder where that strange feeling comes from. In fact, this is one of the ways that we're tricked by time, according to the website. All that S interesting. The website lists several wrong impressions (印象) we often have about time. Let's have a look. First of all, emotions affect (影响) our time-keeping abilities. Negative emotions (消极情绪). especially anxiety and boredom, make time seem longer because they ma 用大小为10 N 的水平推力推静止在水平地面上的桌子，但没有推动，桌子受到的摩擦力________(填“小于”“等于”或“大于”)10 N．假如桌子此时所受的一切外力同时消失，它将________．