对于中学生来说,由于受知识结构和年龄特点的影响,他们面对丰富多彩的植物世界,感觉什么都值得研究,但又似乎觉得都司空见惯。因此不知道应该选哪些研究课题,哪些选题更有研究价值,或有可能和条件进行研究等等。世界著名的物理学家杨振宁教授曾经说过: “一个好的选题,等于实验成功了一半。”选题是研究工作的开始,要想使 For middle school students, due to the influence of the structure of knowledge and age, they face the rich and colorful plant world. What they feel is worth studying, but they seem to be commonplace. So do not know which research topics should be selected, which topics more research value, or may be the conditions and so on. Professor Yang Zhenning, a world famous physicist, once said: “A good topic is equal to half the experiment.” The topic is the beginning of the research work.