中考物理缺陷试题分析

本文对2012年部分省市的中考物理试卷上出现的错误试题、缺陷试题进行分析，说明其缺陷和错误所在，期待对今后的中考命题起到参考作用，促进中考命题的科学、规范和严肃。

Researches of DC-Problem Under the Model S in which the Numbers of Defective Coins are not Fixed

In this paper,we research general Defective Cion Problem under the model S,i.e,the number d of Defective cions is not fixed. For d=O,1,or 2. we get some good results.