在如今我们的出行中，飞机和火车是经常选用的长途交通工具。下图是世界上最早的火车和飞机图片资料，其发明者分别是（   ）

​

C

    In the United States, headmasters and teachers discipline (惩罚) students in several ways. The teacher often writes to or calls the students' parents. Sometimes students have to stay at school for one hour. If a student behaves very badly, the headmaster can stop the student having classes. The student can't come to school for one, two or three days. Mr. Lazarus, the headmaster of a middle school in Ohio, did not like to do so. When he didn't let the students come to school, they were happy. “A three-day holiday!” they thought.

    One day, a boy was in Mr. Lazarus' office. The boy was not behaving well in class. Mr. Lazarus telephoned the boy's parents. “If you come to school with your son, I won't stop him having classes,＂he said. The boy's father came to school and went with his son to every class. Other students looked at the boy and his father. The boy was embarrassed. After that he behaved better. And, of course, other students behaved better, too.

    Now headmasters all over the USA are trying Mr. Lazarus's idea. They too, think that students behave better when parents come to school.

材料一：见下图北京人复原头像

材料二：北京人还保留着猿的一些体质特征，但他们已经能直立行走，上肢基本上具备了现代人的特点。手是劳动的器官，发展较快，变得灵活轻巧。下肢用来支撑身体和直立行走，发展较慢。随着四肢的分化和手的发展，脑也在缓慢地进化。