A:自花传粉;开花前
B:自花传粉;开花后
C:异花传粉;开花前
D:异花传粉;开花后
Some sports that were part of the Olympics in the past have been removed to __________ new sports which are more popular.
读一读,写一写
①妈妈什么时候cái____ 回来呢?
②míng____ 天我们就走了。
新疆的瓜果特别甜,是因为( )
已知点A(1,3), B(3,1 ), C(-1,0),则△ABC的面积为( )