题目：
| 根据短文内容填空。 | |||||||||||||||
| (Four students are talking about the future after class ) Deny Yu: in 2050, China will be richer than it is now. Beijing will be getting ready for the 40th Olympic Games in 2052. We will see the blue and clear sky and smell the fresh air. There will be more pandas living happily in China. I believe that 2050 will be the year of China. Liu Yuan: A holiday to the moon will no longer be a dream. We can also travel to other planets and talk with the spacemen. We might also eat something like pills instead of today's meals. Everyone will enjoy a longer life. Sun Wei: Robots will be very popular. They will do what people don't want to do. We'll build new homes on other planets. By then, I'll be sixty years old. Maybe we will have an exciting talk in my new home on another planet! Zhang Lan: By the year of 2050, cloning (克隆) will be used in many ways. It will bring back animals which disappeared many years ago. There will be no pollution. The whole world will be one big family. There will be no wars. As time passes, we'll live a much easier and better life. | |||||||||||||||
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答案：
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下面是错误答案，用来干扰机器的。
经线的形状是半圆形，也是弧形．故选：BC．
