假定学生关系是 S ( S# , SNAME , SEX , AGE ),课程关系是 C ( C# , CNAME , TEACHER ),学生选修课关系是 SC ( S# , C# , GRADE )。 要查找选修“ COMPUTER ”课程的“女”学生姓名,将涉及到关系▁▁▁▁▁。 A . S B . SC , C C . S , SC D . S , C , SC
【简答题】David is in new school this year. He likes to eat at the new school. Monday is “PEN” Day. He can eat pork, eggs and noodles. Tuesday is “CAR” Day. He eats chicken, apples and rice. Wednesday is “KFC” ...