is mentioned above,the number of the students in senior is mentioned above,the number of the students in senior high schools is increasinga that b as c which d it
问题描述：
is mentioned above,the number of the students in senior
is mentioned above,the number of the students in senior high schools is increasing
a that b as c which d it
答
选择B 非限制性定语从句,指代下文全部内容,“如上所述,高中生的人数在增长”
如果选D it的话需要写成 It is mentioned that the number of the .