学生数据库包含如下三个表:student(学号,姓名,性别,年龄,所在系)答:1select student.姓名,sc.成绩from student,course,sc where student.学号=sc.学号 and course.课号=sc.课号 and student.性别='女' 2select student.姓名,sc.成绩from student,course,sc where student.学号=sc.学号 and course.课号=sc.课号 and student.年龄=22 and course.课程名='英语' ...