下列属于可再生资源的有①土地②水③森林④矿产( )
A:①②③④
B:①②③
C:①③④
D:②③④
在夏季中午光照最强的情况下,绿色植物的光合作用强度略有下降。这时,叶肉细胞内的 C3、 C5、 ATP 的含量变化依次是()
Hello ! My name is LiQiang . There are four people in my family . My father is a worker . My mother is a farmer . My little sister is a pupil. I am a pupil , too . We are in the same school .