This is a cat.
A：white
B：black
C：brown
如图，在直角梯形ABCD中，AD∥BC，∠C=90°，且AB>AD+BC，AB是⊙O的直径，则直线CD与⊙O的位置关系为（ ）
____Thanks, Mum.
____What about some juice?
____Here you are.
____I'm thirsty (口渴的), Mum.
____No, I'd like a glass of milk.
若A=（2+1）（22+1）（24+1）（28+1）+1，则A的末位数字是____
