题目

短文填空。从下面方框中选出10个单词，用其适当的形式填入短文空格内，使短文意思正确、通顺（每词限用一次）。将答案按编号依次填入答题卷的方框里。 they, thing, and, an, some, too, be, know, on, youthey, thing, and, an, some, too, be, know, on, youWelcome to the New York City Lost and Found Office. People often lose 【1】 when they’re on the way to work or to school. They lost things 【2】 buses, on trains, on planes and in taxis. So there are lost and found offices in the city.The New York City Lost and Found Office 【3】 v质量为m=1kg的物体在水平面上，物体与水平面之间的动摩擦因数为μ=0.2．现对物体施加一个大小变化、方向不变的水平力F，为使物体在3s时间内发生的位移最大，力F的大小应如下面的哪一幅图所示              （    ）