电饭煲具有保温和加热功能，晓东同学设计了如图所示的模拟电路（R₁＞R₂），其中保温状态和加热状态电功率都最小的是（　　）

增加：在缺词处加一个漏字符号（∧）,并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1). 每处错误及其修改均仅限一词；

2). 只允许修改10处，多者（从第11处起）不计分。

    Harmony is very important to our society. All of us are looking forward to live in a harmonious society. As students, I thought we should first keep our dormitories with harmony. For one thing, it can create a good environment for my studies and life. For other, it can help us grow healthily. Unfortunately, there are some way to make our dormitories harmonious. Firstly, we should learn to understand each other and solve everything in the peace. Secondly, we should try to get rid our own bad habits. Lastly, we should share or get on with each other.

整理一批数据，由一个人做要40小时完成．现在计划由x人先做4小时，再增加2人和他们一起做8小时，完成这项工作，假设这些人的工作效率相同，则得（　　）