探索中求真知,纠错中谋发展。笔者有幸参加了盐城市201 5年中考数学试卷的命题工作,期间出现的一个“险情”让我们至今仍心有余悸,现将其整理成文,以警示读者。1思维定式,误入歧途如下是签字后成品卷上的第26题。题目1如图1,已知四边形ABCD是菱形, Seek truth from facts, correct errors and seek development. I was fortunate enough to participate in the Yancheng 201 5 papers in the test papers proposition work, during which a “dangerous situation ” so that we still have a lingering fear, now it is organized into written to alert readers. 1 mind set, go astray The following is the 26th title on the finished roll after signing. Topic 1 As shown in Figure 1, the known quadrilateral ABCD is a diamond,