《全日制义务教育语文课程标准》要求初中生要学会“写简单的说明文,做到明白清楚”。对于初中生来说,阅读和写作说明文都是回避不了、绕不过去的硬任务。写说明文就要用简明的语言对事物的性质、形状、用途、成因、结构、功能、特征等加以解说和介绍,传授知识是这类 “Full-time compulsory education language curriculum standards” require junior high school students to learn “write a simple description, so clearly ”. For junior high school students, reading and writing explanatory texts are hard tasks that can not be avoided and can not be circumvented. The descriptive text should be concise and easy to explain and introduce the nature, shape, purpose, cause, structure, function, characteristic, etc. of the things