A:运动时,人的内环境稳态会遭到破坏
B:当稳态遭到破坏时,可能导致疾病发生
C:稳态是机体进行正常生命活动的必要条件
D:稳态有利于酶促反应的正常进行
He has ordered a watch on line for his father and it _______ to him before Father's Day.
如图,AB是⊙O的直径,点C、D在⊙O上,且AC平分∠BAD,点E为AB的延长线上一点,且∠ECB=∠CAD.