A:little red French interesting oil
B:interesting little red French oil
C:interesting French little red oil
D:little red interesting oil French
①是先天性行为 ②是学习行为 ③是由遗传因素决定的 ④是由环境因素决定的
is the tiger's favourite food.
如图①,在正方形ABCD中,对角线AC、BD交于点O,动点P在线段BC上(不含点B),∠BPE= 12 ∠ACB,PE交BO于点E,过点B作BF⊥PE,垂足为F,交AC于点G.