[习作要求]按要求观察一次实验的过程和结果,并将观察所得写下来。一、实验目的和实验结果要写清楚。老师所做的实验的目的是什么?结果是怎样的?要搞清楚并写下来。二、实验的过程是重点,注意写作顺序要与实验的顺序一样,切记顺序不能搞颠倒,还要注意把每一步所用的材料、实验 [Requirements for the assignment] Observe the course and result of an experiment as required and write down the observations. First, the purpose of the experiment and experimental results to write clearly. What is the purpose of the experiment done by the teacher? What is the result? To find out and write down. Second, the experimental process is the focus, pay attention to the order of writing and the order of the experiment, remember the order can not engage in reversing, but also pay attention to the material used in each step, experiment