True, we can use the attraction force of a magnet to separe the magnetic components, If a coin is made of gold, we can find it with a metal detector, When components in a mixture are combined without quimical reaction they can be separeted easily, False, All metals have magnetic properties, We can use repelling force of a magnet to separate components in a mixture, Magnetic components are not attract to a magnet

排行榜

视觉风格

选项

切换模板

恢复自动保存: