You must think a computer is the best thing in the world, right? You must think it works at a super speed and can do everything? Well, it’s not! In fact, the brain is much more powerful than any super computer! Think about when a glass is just about to fall off the table. Your brain controls everything that you need to do to save that glass from falling. First your eyes check out what’s going on, then tell your brain, and your brain decides how quickly you need to react(反应), and then your muscles(肌肉) go into action. That is just from your brain. No computer could ever come close to that!
The brain weighs just 3 pounds, but it controls everything you do from thinking, learning, feeling even to breathing and your heart beating. Even though the brain is just 2% of your body weight, it uses around 20% of all your energy in your body. That is a lot for such a small organ(器官). There are about 100 billion tiny, tiny little cells(细胞) in your brain. There are so many that it would take you over 3,000 years to count them all!
Your brain stops growing when you’re 18, but it actually keeps on developing and learning new things. So your parents are really super smart! You won’t be able to fool them! Believe it or not, your brain NEVER stops working. Even during sleeping, the brain works for long-term memory establishment(建立). It is realized that the brain is the second organ in the body as the heart that never stops during human lives.
So everyone should be proud of such a gift of nature.
16. In Paragraph 1, the writer wants to tell us .
A. eyes and muscles react quickly
B. the brain controls everything in your body
C. the computer is the best thing in the world
D. the brain is more powerful than any computer
17. In Paragraph 2, the underlined word “That” refers to(指的是) .
A. the body weight    B. 2% of the body weight
C. all energy in the body    D. around 20% of the energy in the body
18. Which is RIGHT according to the passage?
A. The brain doesn’t work during sleeping
B. The brain is the only organ that never stops
C. The brain keeps growing during human lives
D. The brain keeps on developing during human lives
19. Which word can best describe the brain according to the passage?
A. Magic    B. Quick    C. Light    D. Developing
20. In which magazine can the passage be found most probably?
A. Business Weekly    B. Medicine    C. Science    D. Sports
【答案】16. D    17. D    18. D    19. A    20. C
 
16. 主旨大意题。由文章第一段“In fact，the brain is much more powerful than any super computer”可知，作者第一段是想要告诉我们 “事实上，大脑比任何电脑要强大的多” 故答案选D。
17. 推理判断题。由句子Even though the brain is just 2% of your body weight, it uses around 20% of all your energy in your body. 可知，即使大脑仅仅是你身体重量的2%，但是它使用的能量大约是你身体能量的20%。和句子That is a lot for such a small organ(器官).的意思是，对于这样一个小器官来说，这是很多的。说明That是指上文的around 20% of the energy in the body。故选D。
18. 细节理解题。“根据文章内容哪一个是正确的？”由第三段Believe it or not ……establishment
(信不信由你，你的大脑从未停止工作。甚至在睡觉期间，大脑也在为长时记忆的建立而工作着。)可知选项A大脑在睡觉时停止工作是错误的。由第三段最后一句It is realized that the brain is the second organ in the body as the heart that never stops during human lives. 可知心脏也不停止工作，大脑是第二大不停止工作的器官。所以B选项说大脑是唯一不停止工作的器官是不正确的。由第三段第一句Your brain stops growing when you’re 18.在18岁的时候大脑停止生长。可知C选项大脑一直生长是不正确的。由第三段第一句后半句but it actually keeps on developing and learning new things. 可知D选项是正确的。故答案选择D。
19. 推理判断题。题意为：“根据这篇文章，哪一个单词可以最好的描述大脑？” Magic “不可思议的”；quick“快的”；light“亮的”；developing“发展中的”。根据文章的描述，大脑很神奇不可思议，故答案选择A。
20. 推理判断题。题目意为“这篇文章最可能在哪一种杂志中发现？”很明显是在科学杂志中，故答案选择C。