假定学生Students和教师Teachers关系模式如下所示：Students(学号,姓名,性别,类别,身份证号)Teachers(教师号,姓名,性别,身份证号,工资)a．查询在读研究生教师的平均工资、最高与最低工资之间差值的SQL语句如下：SELECT （ ）FROM Students,TeachersWHERE （ ）；b．查询既是研究生，又是女性，且工资大于等于3500元的教师的身份证号和姓名的SQL语句如下：(SELECT 身份证号,姓名FROM StudentsWHERE （请作答此空）)（ ）(SELECT 身份证号,姓名FROM TeachersWHERE （ ）)

假定学生Students和教师Teachers关系模式如下所示：Students(学号,姓名,性别,类别,身份证号)Teachers(教师号,姓名,性别,身份证号,工资)a．查询在读研究生教师的平均工资、最高与最低工资之间差值的SQL语句如下：SELECT （ ）FROM Students,TeachersWHERE （请作答此空）；b．查询既是研究生，又是女性，且工资大于等于3500元的教师的身份证号和姓名的SQL语句如下：(SELECT 身份证号,姓名FROM StudentsWHERE （ ）)（ ）(SELECT 身份证号,姓名FROM TeachersWHERE （ ）) Some students are afraid of the teachers ________ strict with students. Most students used to listen to their teachers in class and completely obey their teachers，__________? Students must be strict _________ theirstudies and teachers should be strict ________ their students. They should ____ to unite students and teachers. There are about _________ teachers and students in their school. The success of the system ________ the students and their teachers. Which is the most advantageous relationship mode between teachers and students for the development of students? Which is the most advantageous relationship mode between teachers and students for the development of students? What do you think of your teachers?—Not all the teachers are very strict ________ their students.[ ] Teachers and students should consider correction as_______． English teachers can always help the students _____.[ ] All the teachers and students are ____to attend it on time. The students should become (independence) ____________ of their teachers. The students should not (become） dependent of their teachers. The teachers of this class teach their students in English. Which of the following is the most advantageous relationship mode between teachers and students for the development of students? 简述学生和教师的关系。 Are the teachers having a discussion with the students—No. The teachers don’t play part in deciding the winner. Sometimes students hardly understand their teachers,________-No, they________. I think they should tryto understsnd their teachers.