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这篇课文是著名生物学科普作家贾祖璋撰写的。原发表在一九七九年《光明日报》,后收入《生物学碎锦》。一九八一年被评为全国“新长征优秀科普作品”一等奖。本文旨在说明花儿为什么这样“红”的科学原理。从说明的角度看,属于阐释性说明文。阐释性说明文一般在说明事物性状特征的同时,还要阐释形成这些特征的原理,它要求比介绍性说明文具有更高的逻辑思维能力。因此,教这篇课文的时侯,可适当进行逻辑思维能力的训练。从写作的角度看,本文运用了设问、分项、举例、比较、引用等多种说明方法,条分缕析,枝叶清楚。因此,在讲读这篇课文时,要着重培养学生运用多种方法说明事理的能力。具体的讲读方法,可分为——抓关键,解题意。标题是文章的“窗口”,透
This text was written by Jia Zuyi, a famous biological science writer. Originally published in the “Guangming Daily” in 1979, the income was “Biological Brocade.” In 1981, he was awarded the first prize of the National New Long March Excellent Scientific Works. This article aims to explain why the “red” scientific principle of flowers is so. From the point of view of explanation, it is an explanatory exposition. Explicative explanatory texts generally explain the characteristics of things, but also explain the principle of forming these characteristics. It requires higher logic thinking ability than introductory explanatory texts. Therefore, at the time when this lesson is taught, logical thinking skills can be properly trained. From the writing point of view, this article uses a variety of explanation methods such as questioning, subitem, example, comparison, and citation. Therefore, when reading this text, we must focus on cultivating students’ ability to use various methods to explain affairs. Specific reading methods can be divided into: grasp the key and solve the problem. The title is the “window” of the article.