菠菜属于被子植物的主要依据是( )
A:能进行光合作用
B:种子外面有果皮
C:有根、茎、叶的分化
D:营养方式的自养
—Oh, really? Have you got any valuable idea?
下列图形中,既是轴对称图形又是中心对称图形的是( )
If you do some more reading, listening and speaking, you can the number of words and your listening and understanding ability.