202DS:A girl rounded her phone bill to the nearest $1, is the result of her calculation with $8 of the real figure? 1) every phone call bill is below 4.75 2) she made 14 calls this month. 作者答案及思路:I chose B 我觉得它的题目意思是:如果将电话费四舍五入到1元,那么下面的条件能够算出电话费为8元吗? 203DS:问是否-2 1)(X-1)(X+1)=0 2) X=0 作者答案及思路:到底选D还是选B ? DZ评价意见:D 因为(1)x=1或-1,(2)x=0,都不等于-2,所以都可以回答上面的问题,选d