A:-2,0∪0,+∞
B:-2,+∞
C:(-2,1
D:1,+∞
上楼的小朋友是靠( )边走。
— Jim's mother dislikes cartoons in the Past, but now she likes to watch them with little Jim.
— Oh, just as the saying goes, .
某工地原有大小两堆沙子,共重24吨,在小堆沙子上又加入4吨,从大堆沙子里用去25%后,两堆沙子的重量正好相等,求这两堆沙子原来各是多少吨?正确的解答是( )