传统途径和旁路途径被激活的关键物质是()
A.Cls
B.C
C.C3
D.C1q
E.Clr
参考答案:C
It’s good for children to drink every day.
A.two glasses of milks
B.two glass of milk
C.two glasses of milk
D.two glass of milks.
蚕豆花受精作用完成后,花的结构中发育成蚕豆种子的是( )
A.花粉管
B.胚珠
C.子房
D.受精卵