阅读短文，下列问题

A

    My name is Joe. I'm a student in No. 1 Middle School. I have a brother and a sister. They are Tony and Mary. We are in different schools. Every morning, we get up at half past six. At seven o'clock, we have breakfast with our parents. Then we go to school.

    Tony's school is about two kilometers from our home, so he goes to school by bike. He thinks it's healthy. It takes him about ten minutes to get to school. Mary is in No. 3 Middle School. How does she go to school? She takes a bus first. Then she has to take the subway. She needs forty minutes to get to school every day.

    I walk to school because my school is only one kilometer from my home. I need about ten minutes to get to school. And I'm never late for school.

现有电源、开关、电流表、电压表、灯泡、滑动变阻器各一个，其中灯泡的U﹣I图象如图所示．将这些元件用导线连成电路后，闭合开关，滑动变阻器的滑片从最左端向右滑动的过程中，电压表的示数从5V开始减小，电流表的示数从0.3A开始增大．下列结论正确的是（  ）

关于内能及其利用，下列说法正确的是

***曾写道：“赫赫始祖，吾华肇造……”这里的“始祖”是指（    ）