2012年广东高考理科数学试题揭晓后,普遍感觉试题较浅,可能平均分会大增.结果也证实了这一说法,这份试题的难度、信度、效度和区分度都比较理想.但第20题例外,很多老师认为这道题太浅,一看就知道怎么做,甚至有老师说这道题等于送分.事实果真如此吗?全省平均1.94分,难度系数 After the Guangdong college entrance examination science math test was unveiled in 2012, it is generally felt that the examination questions are shallow and may increase in average. The results also confirm this statement, which is more difficult, reliable, effective and differentiated. 20 questions, many teachers think this problem is too shallow, a look to know how to do, and even the teacher said the problem is equal to send points. The fact is it true? The province’s average of 1.94 points, the degree of difficulty