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.

　　If exercise wears you out, how can it be good for you?

　　Because our bodies adapt to everything we do to them. And as far as your body is concerned, it's “use it, or lose it”！ It's not that exercise makes you healthy; it's more that a lack of exercise leaves your body weak and easily affected by disease.

　　46. What is the colour of blood in a vein near the surface of the skin?

　　A. Blue.

　　B. Light yellow.

　　C. Red.

　　D. Dark reddish purple.

　　47．Why do some old people look a little shrunken as they age?

【天津市蓟县2016届高考英语一轮阅读理解专题选练（6）】相关文章：

★ 天津市武清区杨村第四中学2016届高考英语一轮复习语法专题六《定语从句》课件外研版

★ 天津市武清区杨村第四中学2016届高考英语一轮复习语法专题八《情态动词用法详解》课件外研版

★ 河南省三门峡市2014高考英语一轮（暑假）基础训练（5）附答案

★ 重庆市2014高考英语阅读理解一轮（精品）训练题（6）附答案

★ 安徽省淮南市2014高考英语一轮单项选择及文章训练（9）及答案

★ 【优化方案】2017届高考英语二轮复习全国卷Ⅱ规范练：3（含解析）

★ 2017届高考英语二轮复习大题冲关秘籍完形填空之记叙文：应试策略（含解析）

★ 天津市武清区杨村第四中学2016届高考英语一轮复习语法专题二《倒装句专练》课件外研版

★ 2017届高考英语二轮复习课时训练：16（含解析）

★ 2017高考四川省广安市英语阅读理解一轮系列训练：8（含解析）