Food is very important to our health. Everyone needs to eat well if he or she wants to have a strong body.Our minds, like our bodies, always need the best food. This kind of food is knowledge. We start getting knowledge when we are very young.
公元前4世纪,亚历山大建立起地跨欧、亚、非三洲的大帝国,其首都设在( )
— . In my opinion, it can help you become a person full of love.
下列根式中,为最简二次根式的是( )
有关温度、热量、内能的说法,正确的是( )