题目内容
13.Can this small grey organ(器官),which weighs less than one and a half kilos,really do so much?Amazingly,your brain contains about 100billion neurons(神经元)-it would take you over 3,000years to count them all.Believe it or not,the activity in your brain never stops.Your neurons create and send more messages than all the phones in the world.And although one neuron creates only a little electricity,all your neurons together can produce enough electricity to power a light bulb (灯泡).
So exactly how fast does your brain work?Well,imagine this:a bee lands on your foot.Neurons in your skin send this information to your brain at a speed of more than 240kilometers per hour.Your brain then uses other neurons to send the message back to your foot to shake the bee off quickly.These neurons can send this information at more than 320kilometers per hour.No computer has your brain's unbelievable ability to deal with the amount of information coming from your eyes,ears and other sensory organs.
But how does your brain allow you to learn things that you will use in the future?The structure (结构) of your brain changes every time you have a new thought,remember or learn something.For example,riding a bike seems impossible at first,but soon you are able to do it.How?As you practice,your brain sends"bike riding"messages again and again.Soon,the actions are learnt and you are able to ride a bike easily from then on.
53.From the passage we know that neuronsC.
A.receive messages very slowly
B.are only found in your skin
C.send messages to your brain
D.need electricity to work
54.In Paragraph 3,the writer mentions computers toA.
A.compare them with the human brain
B.show how fast they have become
C.say that computers have no abilities
D.ask people to use computers more
55.When you have a new thought,D.
A.your brain will power a light bulb
B.your heart beats faster
C.you remember something
D.the structure of your brain changes
56.The article is mainly aboutB.
A.all the steps when your brain learns things
B.what an unbelievable organ the human brain is
C.how the brain makes people smarter than computers
D.the things you can do to make your brain work faster.
分析 我们的大脑控制一切,它会让我们思考,学习,创造,感觉,眨眼,呼吸,心跳,科学家把它称为"宇宙中最复杂的东西".大脑中有1000多亿个神经元,神经元产生信息,并把信息传送到大脑.比如:有只蜜蜂落在你的脚上,神经元就会把这个信息传到大脑,大脑就会传给你的脚一个信息,把蜜蜂抖掉.其速度比电脑快多了,当你有一个新的思想或者记忆、学习的时候,大脑的结构就会改变.
解答 53.C.细节理解题.根据"Your neurons create and send more messages"以及"Neurons in your skin send this information to your brain"可知神经元把信息传送到大脑.故选C.
54.A.细节理解题.根据"No computer has your brain's unbelievable ability to deal with the amount of information coming from your eyes,ears and other sensory organs."没有电脑能够处理这么大量的来自眼睛,耳朵以及其他感官的信息.主要是用电脑和人脑进行比较.故选A.
55.D.细节理解题.根据"The structure (结构)of your brain changes every time you have a new thought"可知当有新的想法的时候,大脑的结构就会发生变化.故选D.
56.B.主旨大意题.本文主要介绍了人的大脑---这个神奇的器官.大脑控制一切,它会让我们思考,学习,创造,感觉,眨眼,呼吸,心跳,科学家把它称为"宇宙中最复杂的东西".故选B.
点评 做题时要在理解好文意的基础上,与题目有机的结合,从文章中找到相关细节性的句子与选项细细比对,进行选择或推理判断,找出符合文章内容的正确答案.
| A. | third | B. | three | C. | second | D. | two |
-Yes.He thinks they are very nice,but they are much too expensive for him.( )
| A. | how he likes | B. | where did he buy | ||
| C. | how does he like | D. | where he bought |
| A. | unless | B. | when | C. | until | D. | although |
| A. | expert | B. | expect | C. | except | D. | excuse |
| A. | This | B. | He | C. | It | D. | She |