閱讀下面材料，從每題所給的A、B、C、D四個選項中選出最佳選項

Your brain controls everything you do. It makes it possible for you to think, Learn, create and feel; to blink(眨眼) and breathe and for your heart to heat –this fantastic control center is your brain. It is so amazing that a famous scientist once called it " the most complex(復(fù)雜) thing we have yet discovered in our universe".

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 100 billion neurons(神經(jīng)元) -it would take you over 3 ,000 years 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 neumn creates only a little electricity, all your neurons together can produce enough electricity to power a light bulb (燈泡).

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 240 kilometers 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 320 kilometers per hour. No computer has your hrain'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 leam things Lhat you will use in the future? The structure (結(jié)構(gòu)) of your brain changes every time you have a new thought, remember or leam 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.

1.From the passage we know that neurons______________ .

A. receive messages very slowly

B. are only found in your skin

C. send messages to your brain

D. need electricity to work

2.In Paragraph 3, the writer mentions computers to ______________ .

A. compare them wich the human brain

B. show how fast they have become

C. say that computers have no abilities

D. ask people to use computers more

3.When you have a new thought, ______________ .

A. your brain will power a light bulb

B. your heart beats faster

C. you remember something

D. the structure of your brain changes

4.The article is mainly ahout ________________ .

A all the steps when your brain leams things

A. what an unbelievable organ the human brain is

B. how the brain makes people smarter than computers

C. the things you can do to make your brain work faster

練習冊系列答案
相關(guān)習題

科目：初中英語 來源：山東省日照市莒縣2017屆九年級下學期第二次學業(yè)水平模擬測試英語試卷 題型：單詞拼寫

1.My mother likes staying at home, so she s________ goes out.

2.If you want to look after the naughty (淘氣的) boys well, you should be p_______.

3.Tom decides to have a party tomorrow evening. Have you received his i_______.

4.Mother’s Day is on the s_______ Sunday of May. We should show our love to mum on that day.

5.Pass me that pair of glasses, please. 1 can't see the words c______.

6.While watching the ball match, we couldn’t stop clapping with _______ (激動).

7.Jim feels lonely in a new school because he hardly _____________(交流)with other students.

8.We hope you can _________ (提供) us with some information about shopping online.

9.Although he was______(反對)my opinion, the old professor didn’t come up with his own.

10.Fred has lived in China for ten years so he’s got used to_________ (表達) himself in Chinese.

查看答案和解析>>

科目：初中英語 來源：廣東省汕頭市澄海區(qū)2017屆九年級5月中考模擬英語試卷 題型：單項填空

--______ talented boy could write lyrics when he was at the age of ten.

--And he was brave enough to sing in ___ public then.

A. The, the B. A, the C. The, / D. A, /

查看答案和解析>>

科目：初中英語 來源：云南省2016-2017學年七年級下學期期中考試英語試卷 題型：單項填空

You must come here .

A. for time B. on time C. at times D. sometime

查看答案和解析>>

科目：初中英語 來源：山東省濰坊市業(yè)水平模擬考試（一）英語試卷 題型：書面表達

自我保護是青少年需要掌握的重要技能。假設(shè)你叫李華，是一名中學生，請以“How to protect ourselves” 為題寫一篇短文，談?wù)勗诿鎸?zāi)難、謊言、騙局或生活中的意外等情況時，該怎樣進行自我保護。

要求：

1.80詞左右；

2.書寫工整，語句通順，語法正確；

3.文中不得出現(xiàn)個人姓名、學校等真實信息。

How to protect ourselves

________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

查看答案和解析>>

科目：初中英語 來源：山東省濰坊市業(yè)水平模擬考試（一）英語試卷 題型：單項填空

The Greens live _____ that building. They live ______ the sixth floor.

A. on ; in B. of ; to C. in ; on D. to ; at

查看答案和解析>>

科目：初中英語 來源：山東省濰坊市業(yè)水平模擬考試（一）英語試卷 題型：單項填空

– Would you like some more meat?

– __________.

A. No, I wouldn’t. B. No, thank you. I’ve had enough.

C. Yes, I’d like a drink. D. No, I don’t like it.

查看答案和解析>>

科目：初中英語 來源：山東省濱州博興縣2017屆九年級學業(yè)水平模擬英語試卷 題型：單項填空

Carla can’t stand the boy ___ often plays jokes on her in front of the whole class.

A. which B. who C. what D. whom

查看答案和解析>>

科目：初中英語 來源：江蘇省興化市顧莊學區(qū)三校2017屆九年級第三次網(wǎng)上閱卷適應(yīng)性訓(xùn)練（三模）英語試卷 題型：完形填空

The passengers on the bus watched with sympathy(同情)as Susan made her way carefully up the steps. She paid for the drive and then，using her hands to _________ the seats, settled(安頓)in one of them.

It had been a year since Susan became blind. As the result of an accident she was suddenly thrown into a world of _________. Susan’s husband Mark watched her fall into hopelessness and he decided to use every possible means to help his wife.

Finally, Susan felt ready to _________to her job， but how would she get there? She used to take the bus, but she was now too afraid of getting around the city by herself. Mark volunteered to ride the bus with Susan each morning and evening until she could _______ it by herself.

For two weeks, Mark went with Susan to and from ________ each day. He taught her how to depend on her other ________, specifically her hearing, to decide where she was.

At last, Susan decided that she was _________ to try the trip on her own. Monday morning arrived. Before she left, she held her husband tightly, her eyes filled with tears of thankfulness. She said good-bye and, for the first time, they went their_________ ways. Each day went ________, and a wild excitement took hold of Susan. She was doing it!

On Friday morning, Susan took the bus to work as ________. As she was getting off the bus, the driver said, “Miss, I sure ________ you.” Surprisingly, Susan asked the driver ________.

“You know, every morning for the _________ week, a fine-looking gentleman in a military uniform has been standing across the corner watching you until you enter your office building ________ ,” the bus driver said.

Tears of happiness ran down Susan’s cheeks. She was so lucky for he had given her a gift more powerful than ________. That is the gift of love that can bring light where there is darkness.

1.A. feel B. choose C. count D. touch

2.A. weakness B. sickness C. darkness D. sadness

3.A. return B. keep C. belong D. stick

4.A. try B. manage C. control D. follow

5.A. home B. hospital C. school D. work

6.A. feelings B. parts C. senses D. skills

7.A. busy B. happy C. ready D. willing

8.A. opposite B. separate (分開的) C. fixed D. normal

9.A. terribly B. perfectly C. sadly D. badly

10.A. possible B. usual C. if D. often

11.A. admire B. respect C. know D. support

12.A. what B. how C. why D. where

13.A. next B. same C. first D. past

14.A. quickly B. silently C. happily D. safely

15.A. courage B. direction C. sight D. service

查看答案和解析>>

同步練習冊答案