Robots seem very new to most people. But they have a 1 history. A Greek scientist made the first robot. You may 2 robots in some movies. The robots in the movies are usually stronger, faster and 3 than people. In real life, most robots are used in factories. They can do lots of dangerous, difficult or4 jobs. Some people can't look 5 themselves and robots can help them. For example, some people can't see, and they use a guide dog to help themselves move. But now scientists are making a 6 to help them.

    Robots are also used in American hospitals. At one hospital, a robot 7 meals from the kitchen to the sick people's rooms. It never loses its 8 because it has a map of the hospital in its computer system(系统). 9 the future, robots will even work in space. But robots will 10 take the place of(代替)people but only work for people. They can, however, help us in a lot of different ways.

李白的《望庐山瀑布》中有“遥看瀑布挂前川”之句，后人评述此句的意境全在“挂”字之上。这是因为此字体现了（  ）

①动中有静，静中有动 ②物质是运动的物质，运动是物质的存在方式 ③绝对运动与相对静止是统一的 ④运动是物质的运动，物质是运动的承担者

学校做了一批平行四边形的彩旗，每面彩旗的底是24厘米，面积是1200平方厘米，你能算出彩旗的高是多少厘米吗？