已知集合A={1，2，3，4，5}，B={（x，y）|x∈A，y∈A，x﹣y∈A}，则B中所含元素的个数为

题干

已知集合A={1，2，3，4，5}，B={（x，y）|x∈A，y∈A，x﹣y∈A}，则B中所含元素的个数为（　　）

A：3

B：6

C：8

D：10

上一题下一题 0.0难度选择题更新时间:2019-06-16 11:31:03

D

Garden Restaurant

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Open：Mon. to Fri. 7:00 a.m.～2:30 p.m. and 5:00 p.m.～9:00 p.m.

Sat. 7:00 a.m.～11:00 a.m. and 5:00 p.m.～9:00 p.m.

Sun. 11:00 a.m.～2:00 p.m. and 5:00 p.m.～9:00 p.m.

New York Museum

America's largest museum specializing in American history

Telephone：7364431 Address：Vanier Park, 1100 Chestnut St. New York

Open：Mon. to Fri. 9:00 a.m.～5:00 p.m. (Monday free) Sat. 9:00 a.m.～1:00 p.m.

Lansdowne Park Shopping Center

Telephone：3562364Address：5300 No. 3 Road

Open：Mon. Tue. & Fri. 9:30 a.m.～5:30 p.m.

Wed. Thurs. & Sat. 9:30 a.m.～9:30 p.m. Sun. 11:00 a.m.～5:00 p.m.

Skyline Hotel

Telephone：2785161 Address：3030 No. 3 Road (at Sea Island Way)

The Hangar Den Wed. to Sun. Dinner from 5:30 p.m.

Coffee Shop Mon.～Fri. 6:00 a.m. Sat. 6:30 a.m., Sun. 7:00 a.m.

Mon.～Wed. to 10:00 p.m. Thurs.～Sun. to 11:00 p.m.