On February 9th, 2013, Sarah Darling was walking along the street when she met a homeless man named Billy Ray Harris. She reached into her change purse, emptied out all the coins she had and gave them to the homeless man. Neither of them realized that this small generous act would change their lives.

    Sarah didn't realize that she had given Billy not only all her change but also her diamond ring that she had put in her change purse earlier until the following morning. She and her husband, Bill Krejci, rushed to see if they could find Billy. The homeless man was not only in the same place, he also immediately returned the ring. The grateful couple paid him back for his honesty by emptying out their pockets of all the money they had.

    Bill Krejci, a web designer, felt that he needed to do something more for this amazingly honest man. So on February 18th, he set up a special page to raise money for him. In just four days, Billy received over $85,000 and there seems to be no end yet.

    That is not enough. Billy is living with a person who is generous instead of living in the streets. And that's not all—thanks to the news report, he got together again with his older brother, Edwin Harris, who he had been unable to find for 27 years.

    All the good luck is just because Billy did the right thing—returning something that did not belong to him.

____ 是进化论的建立者．他认为，人类和现代类人猿的共同祖先是森林古猿；下到地面生活的森林古猿，由于____的改变和自身的变化，一代一代地向着____ 的方向发展，____肢解放出来，臂和手逐渐变得灵巧，能使用和制造____．

下列事例中，没有利用超声波的是（　　）

某同学在“测定小灯泡额定功率”的实验中，所用电源电压为6伏，小灯泡L的额定电压为2.5伏，他按图甲所示的电路进行实验。实验时，他调节滑动变阻器滑片的位置，观察小灯泡发光的情况，并记录电表的示数，如下表所示，请回答下列问题：

（1）请你用笔画线代替导线，根据图甲所示的电路图，将图乙所示实物图连接完整。

（2）分析表中实验数据，可知小灯泡L的额定功率为            _____瓦。

（3）小施同学分析表中实验数据后，发现还能求得小灯泡的电阻，于是他分别算出了所给的三种情况下小灯泡的电阻并取平均值。你认为小施同学的做法对吗？请说明理由。