A:28×0.5×0.5
B:28×0.2+28×0.05
C:7×(4×0.25)
D:20×0.25+8×0.25
t根据二力平衡相关知识点,探究下列问题:
下列关于生物的生殖发育描述中错误的是( )
In British English, we call it “film”. In American English, what do we call it?