已知集合A={0,1,2,3},集合B={(x,y)|x∈A,y∈A,x≠y,x+y∈A},则B中所含元素的个数为(  ) A.3 B.6 C.8 D.10

问题描述:

已知集合A={0,1,2,3},集合B={(x,y)|x∈A,y∈A,x≠y,x+y∈A},则B中所含元素的个数为(  )
A. 3
B. 6
C. 8
D. 10

当x=0时,y=1,2,3;满足集合B.
当x=1时,y=0,2;满足集合B.
当x=2时,y=0,1;满足集合B.
当x=3时,y=0.满足集合B.
共有8个元素.
故选C.