在用电流表和电压表测干电池的电动势和内电阻的实验中，所用电流表和电压表的内阻分别为0.1Ω和1kΩ，如图（甲）和（乙）分别为实验原理图及所需的实验仪器图．
①试在实验仪器图（乙）中画出连线，将实验仪器按原理图连接成实验电路．
②一位同学根据实验测得的6组数据在图（丙）的U-I图上标出了对应的坐标点（符号为×），请作出U-I图线，并由图线求出电源电动势E=______V，电源内阻r=______Ω．
①根据电路图连接实物图，注意电表的极性，以及滑动变阻器采取限流式接法．
②U-I图线如图所示，将偏离比较远的点舍去．纵轴截距为1.45V，所以电动势E=1.45V，电源内阻r=
=△U △I
Ω=0.75Ω．1.45-1.00 0.60
故答案为：①如图所示．
②1.45，0.75
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| It was her giggling that drew my attention. Note taking really wasn't all that funny. Walking over to the offender, I asked for the __1__. Frozen, she refused to give it to me.I waited, all attention in the classroom on the quiet __2__ between the teacher and the student. When she finally __3__ it over she whispered, "Okay, but I didn't draw it." It was a handdrawn __4__ of me, teeth blackened and the words "I'm stupid" coming out of my mouth. I managed to fold it up calmly. My mind, __5__, was working angrily as I struggled not to __6__.I knew the two most likely candidates for drawing the picture. It would do them some __7__ to teach them a lesson, and maybe it was high time that I did it! Thankfully, I was able to keep myself __8__. When there were about six minutes remaining, I showed the class the picture. They were all silent as I told them how __9__ this was for me.I told them there must be a reason __10__ and now was their chance to write down anything they needed to tell me. Then I let them write silently while I sniffed in the back of the classroom. As I __11__ the notes later, many of them said something like, "I've got nothing against you, " or "I'm sorry you were hurt." Some kids said, "We're __12__ of you." But two notes, from the girls who I __13__ were behind the picture, had a list of issues. I was too __14__, too strict... Reading those notes, I realized that over the course of this year, instead of __15__ my students, I had begun commanding them to __16__.Where I thought I was driving them to success I was __17__ driving them away. I had some apologizing to do. But the next day in the classroom, one boy and one girl each handed me a card. The one __18__ by all the boys expressed sincere regret for the ugly joke. The one from the girls asked for __19__. This was a lesson for both the kids and me. Forgiveness does not change the past, but it does enlarge the __20__. | ||||
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