某生物兴趣小组的同学为了探究某种非生物因素对鼠妇生活的影响，设计了如下实验方案：

①在一个长方形的铁盘内放上一层湿土，以横轴中线为界，一侧盖上黑纸板，另一侧盖上透明玻璃板．（如图）

②将10只鼠妇放入该装置，两侧的中央各放5只，静置于适宜温度下．3分钟后，每分钟统计一次明亮处和阴暗处的鼠妇数目，统计10次，并做好记录．

请根据上述实验方案回答下列问题：

   The best way of learning a language is using it. The best way of learning English is talking in English as much as possible. Sometimes you'll get your words mixed up(混合) and people will not understand you. Sometimes people will say things too quickly and you can' t understand them. But if you keep your sense of humor(幽默感)，you can always have a good laugh at the mistakes you make. Don't be unhappy if people seem to be laughing at your mistakes. It's better for people to laugh at your mistakes than to be angry with you，because they don't understand what you are saying. The most important thing for learning English is："Don't be afraid of making mistakes because everyone makes mistakes."

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