243. There are many kinds of media(大众传播)

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问题选择题

243. There are many kinds of media(大众传播). Which of the following do not belong to the same category?

A．TV, radio, newspaper

B．radio, newspaper, magazine

C．radio, magazine, internet

D．radio, internet, railway

答案

选择题

—How about _____ hiking in the mountain.

—Good idea, but I have _____ to do.[ ]

A. going, important something

B. to go, something important

C. going, something important

D. goes, important something

单项选择题

下列题基于“学生—选课—课程”数据库中的三个关系：
S(S#，SNAME，SEX，AGE)，SC(S#，C#，GRADE)，C(C#，CNAME，TEACHER)

若要求查找“由张劲老师执教的女生的数据库课程的平均成绩、最高成绩和最低成绩”，将使用关系( )。

A．S和SC
B．SC和C
C．S和C
D．S、SC和C