Some schools will have to make ______ in agreement with the national soccer reform.
A:judgments
B:adjustments
C:comments
D:achievements
①终年积雪的雪山 ②一望无际的草地 ③缺少粮食给养 ④敌人围追堵截
执行如下图所示的程序框图,输出的结果S等于