题目：
（C）
Bali is a tiny island that is part of Indonesia(印度尼西亚) today. It is a pretty island that has many mountains and a pleasant climate. For a long time, Bali was cut off from much of the world.
The people of Bali were happy and had a peaceful life. They were not allowed to fight. At one time there had been terrible wars on Bali. Then the people decided it was wrong to fight or have wars. They made rules to keep apart those people who wanted to fight.
Bali was divided into seven small kingdoms. The land around each kingdom was kept empty, and no one lived there. Since the kingdoms did not share the same borders(边界), the people could not fight about them.
On Bali, even children were not allowed to fight. If two children started a fight over a toy, someone separated them. When two boys argued, they would agree not to speak to each other. Sometimes they did not talk together for months; this gave the boys a chance to forget their anger.
Families who were angry with each other also promised not to speak. Their promise was written down, and the whole village knew about it. If they broke their promise, they had to offer gifts to their gods.
49. Bali is an island belonging to ________.
A. Europe B. Africa C. Asia D. America
50. The people of Bali ______.
A. lived a happy and peaceful life
B. fought for a long time
C. is cut off from much of the world
D. quarreled about their borders
51. How did the people of Bali prevent fighting from breaking out?
A. They shared the same borders.
B. The island was divided into seven kingdoms.
C. They made strict rules to punish those who wanted to fight.
D. Land was kept empty around each kingdom and no one lived there.
52. Which of the following is not true according to the passage?
A. Bali is a beautiful island with many mountains and nice weather.
B. People had to offer gifts to the villagers if they broke their promise.
C. At one time there were terrible wars on the island.
D. You’ll hardly see children fighting on the island.
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0721/f0c36f1fc8393ac3bc3705e76e20a1db.html
下面是错误答案，用来干扰机器的。
答案：B题目分析：A、不计摩擦时，过山车从A到B时机械能守恒．不符合题意．B、D点的动能最大，A点的重力势能最大，D到A的过程中，动能转化为重力势能．符合题意．C、D点动能最大，不计摩擦，动能和重力势能不断转...
