A:She doesn't like history
B:She can't remember the dates
C:She doesn't work hard
某人腰椎部位因受外伤造成右侧下肢运动障碍,但有感觉.该病人受损伤的部分可能是在反射弧的( )
①传入神经 ②传出神经 ③感受器 ④神经中枢 ⑤效应器.
如图1,在正方形ABCD中,P在对角线AC上,E在AC的延长线上,PB=PM,DE=EF.