问题
单项选择题
| 第21～22题是基于“学生一选课一课程”数据库中的三个关系： S(S#，SNAME，SEX,AGE)，SC(S#，C#，GRADE)，C(C#，CNAME，TEACHER) |
若要求查找选修“数据库技术”这门课程的学生姓名和成绩，将使用关系( )。
A．S和SC
B．SC和C
C．S和C
D．S、SC和C
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
| 第21～22题是基于“学生一选课一课程”数据库中的三个关系： S(S#，SNAME，SEX,AGE)，SC(S#，C#，GRADE)，C(C#，CNAME，TEACHER) |
若要求查找选修“数据库技术”这门课程的学生姓名和成绩，将使用关系( )。
A．S和SC
B．SC和C
C．S和C
D．S、SC和C
参考答案：D
| 完型填空。 | ||||
| Beethoven had an ugly face and a very 1 temper (脾气) but people 2 him to their homes. When he lost his temper, they forgave (原谅) him. He was often poor and ill during his life. After one illness, he suddenly 3 himself deaf. At that time he was 4 31. What a blow it was on him! 5 this didn't stop Beethoven 6 on in his life.He went on 7 much music. He wrote long pieces and short pieces, happy ones and 8 ones. During his life, he composed (作曲) about 300 pieces. 9 people's surprise, he wrote some of his best and most beautiful pieces 10 he became deaf. Many of them are known and loved all over the world. | ||||
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