A:I had picked up;whe
B:had I picked up;the
C:had I picked up;whe
D:I had picked up;the
下列各项属于脊椎动物的是( )
图中⑤气候,在世界上分布最广的地区是( )
过度干旱会影响农作物的生长,这说明植物的生存需要( )