题目

在鸡蛋清中滴入无色酚酞试液显红色，滴入紫色石蕊试液显蓝色，由此可知，鸡蛋清的pH值在pH标准比色卡的区域可能是 （ ） 答案：D解析:鸡蛋清中滴入无色酚酞溶液显红色，滴入紫色石蕊溶液显蓝色，说明鸡蛋清显碱性，PH大于7．故选D The boy’s mother asked him what _________ with his finger． [　　] A． was the matter B． the matter was C． was the wrong D． wrong was