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现行高中生物必修课本适当增加了一些趣味及常识性知识,总的来说较容易学。但对于基础较差的学生学起来比较费劲,笔者在多年的教学过程中发现,如果把这些内容加以形象化,可很牢固地记忆这些知识。现举几个例子: 一、DNA分子的结构组成中四种含有N碱基,如果死记硬背,很容易混淆又很难记住,但如果把符号与一些无关知识联系起来即可牢记不忘:A表示腺嘌呤,而A是英文字母,G表示鸟嘌呤,如把G横写的话看上去像鸟的头“G”,C表示胞嘧啶,而C是英文ce（细胞）的第一个字母,T为胸腺嘧啶,胸腺在胸部,可联想到穿在躯干部的T恤衫。
The current high school biology compulsory textbooks have added some interesting knowledge and common sense knowledge. It is generally easier to learn. However, for poorly-educated students, it is more difficult to learn. In the course of many years of teaching, the author discovered that if these contents are visualized, they can be firmly memorized. Here are a few examples: First, the structure of the DNA molecule contains four N bases. If you memorize it, it is easy to confuse and hard to remember, but if you associate the symbol with some unrelated knowledge, you can remember it. : A means adenine, and A is English alphabet, G means guanine, if G is written horizontally, it looks like bird’s head “G”, C means cytosine, and C is the first one of English ce (cell) The letter, T is thymine, and the thymus is on the chest. It can be thought of as a T-shirt on the trunk.