题目

My parents send me to a school _____ rules are just as important a part of education as the academic subjects． A．that          B．which         C．where        D．when 答案：C（2分）现有碳酸钠、食盐、食醋，其中滴加紫色石蕊试液变蓝的是 ；其pH由小到大的排列为 。