题目

The Key to Your Health A car needs gas to run and your body also needs food to work for you.Eating the right kind of food is very important.It can help your body grow strong to take care of what you eat. There are four main food groups altogether.The dairy group has food like milk，cheese and sour milk.The other three groups are the meat and fish group，the fruit and vegetable group，and the bread and rice group.Each meal should have at least one food from all four main groups.With all these food together，you will be given enough energy during the day. It is easy to get into bad ea在光照最强的夏季的中午,绿色植物的光合作用强度反而会降低。此时，细胞内C3、C5以及ATP含量的变化依次是A．增加、减少、减少B．减少、增加、增加C．减少、增加、减少D．增加、减少、增加