题目

Jinyong, one of the greatest kongfu fiction writers in China, built a magic kingdom ____people could escape into every now and then. A . as B . whose C . that D . where 答案：C 有理数a、b、c在数轴上的位置如图： 判断正负，用“＞”或“＜”填空：b﹣c__________0，    a+b__________0，c﹣a__________0． （2）化简：|b﹣c|+|a+b|﹣|c﹣a|．