如图所示,在水中有一厚度不计的薄玻璃片做成的中空三棱镜,里面是空气,一束光A从棱镜的左边射入,从三棱镜的右边射出时发生色散,射出的可见光分布在a点和b点之间,则( )
A:从a点射出的是红光,从b点射出的是紫光
B:从 a点射出的是紫光,从b点射出的是红光
C:从a点和b点射出的都是紫光,从ab中点射出的是红光
D:从a点和b点射出的都是红光,从ab中点射出的是紫光
岩石的质量 m(g)
量筒内水的 体积V1(cm3)
放入岩石后量筒内水和岩石 的体积V2(cm3)
岩石的体积 V(cm3)
岩石的密度ρ(kg/m3)
____
60
80
There will be many changes in our life in the future. We will____ flying cars to work. We will travel to ____ . Maybe we will ____ live in space. Students won't ____ schoolbags to go to school any more. They will learn on ____ at home. And there will be robots in our home. The robots will help us do all the housework. Life will be great at that time.