關系代數中，從兩個關系中找出相同元組的運算稱為（）運算。
A.並
B.交
C.差
D.合
正確答案：交
題目：關系代數中，從兩個關系中找出相同元組的運算稱為（）運算。
關鍵字：智慧樹
相關試題
1.在食品強化過程中維生素的添加量可分為（）
2.The role of active involvement in tourism development is that government intervenes in the sector as an investor， to provide infrastructure and supportive services including tourism policy and planning， human resource development， marketing， etc.。
3.International Civil Aviation Organization was established in（）in Montreal， Canada.
4.In the speech， which year was a crux and turning point away from austerity and more people wanting to do different things with their lives.
5.The Belt and Road Initiative was unveiled by President Xi Jinping in（）.
推薦
答案10秒後自動顯示！