Do old people shrink as they age?
Yes and no. Many people do get shorter as they age. But, when they do, it isn’t because they’re shrinking all over. They simply lose height as their spine (脊柱)becomes shorter and more curved due to disuse and the effects of gravity (重力).Many (but not all) men and women do lose height as they get older. Men lose an average of 3-4 cm in height as they age, while women may lose 5 cm or more. If you live to be 200 years old, would you keep shrinking till you were, like 60 cm tall, like a little boy again? No, because old people don’t really shrink! It is not that they are growing backwards --- their legs, arms and backbones getting shorter. When they do get shorter, it's because the spine has shortened a little. Or, more often become more bent and curved.
Why does spinning make you dizzy(眩晕的)?
Because your brain gets confused between what you’re seeing and what you’re feeling. The brain senses that you’re spinning using special gravity-and-motion-sensing organs in your inner ear, which work together with your eyes to keep your vision and balance stable. But when you suddenly stop spinning the system goes out of control, and your brain thinks you're moving while you’re not!
Where do feelings and emotions come from?
Mostly from an ancient part of the brain called the limbic system. All mammals have this brain area — from mice to dogs, cats, and humans. So all mammals feel basic emotions like fear, pain and pleasure. But since human feelings also involve other, newer bits of the brain, we feel more complex emotions than any other animal on the planet.
【五年高考(2011-2015)英语试题分项精解:专题23 阅读理解之科普知识类(原卷版)】相关文章:
★ 2017年高考英语二轮复习精品资料:专题15 完形填空(押题专练)(原卷版)
★ 2017届高考英语二轮复习大题冲关秘籍语法填空:命题分析(含解析)
★ 2017年高考英语二轮复习精品资料:专题16 书面表达(教学案)(教师版)
★ 贵州省贵阳市2014高考英语(新人教版)一轮阅读训练(25)附答案
★ 江苏省扬州市2014高考英语一轮 阅读理解暑假练习题(10)
★ 湖南省长沙县实验中学2016届高三英语二轮复习书面表达复习重点话题指导专题21 语言学习话题指导(学生版)
★ 2017届高考英语二轮复习大题冲关秘籍阅读理解七选五:名校模拟(含解析)
★ 浙江省湖州市2014高考英语阅读理解一轮(暑假)精炼(17)含答案
最新
2017-04-24
2017-04-24
2017-04-24
2017-04-24
2017-04-21
2017-04-21