检索学生学号( xs.xh )及其所选课程的课程号( cj.kcdm )和成绩( cj.cj ),正确的 SELECT-SQL 语句是 。
A.
Select xs.xh,cj.kcdm,cj.cj From xs Where xs.xh=cj.xh
B.
Select xs.xh,cj.kcdm,cj.cj From xs Where xs.xh=cj.cj
C.
Select xs.xh,cj.kcdm,cj.cj From xs,cj Where xs.xh=cj.xh
D.
Select xs.xh,cj.kcdm From xs,cj