What are the limits(極限) of human body? The BBC’s Focus magazine has some answers.
How cold can you stand?
Normal body temperature is around 37℃. At 35℃ you’re unable to write your name. Even walking is very difficult. At 33℃ you may find it difficult to think, understand and form(形成) opinions properly. By the time you have cooled to 20℃, your heart would have stopped beating.
Limit: 0℃. Ice would form in your tissues(纖維組織), killing all the cells.
How spicy can you eat?
There is capsaicin(辣椒素) in many foods. The more capsaicin, the hotter the dishes are. If you’re healthy enough, you can survive(存活) eating a teaspoon of pure capsaicin. But you would find it impossible to eat anything else for a few hours.
Limit: 5g capsaicin.
How fast can you run?
The fastest man in the world is Asafa Powell. The runner finished the 100m in 9. 74 seconds in 2007. This gives an average(平均的) speed of 36. 96km/h.
Top runners are at their fastest around 80 metres, so a runner’s greatest speed may reach 43.06km/h.
Limit: 43.06km/h.
How loud is too loud?
The loudest sound you can hear is 168 dB(分貝). Sound louder than that may do harm to your ears. The loudest sound ever recorded was the eruption of Krakatoa(卡拉卡托火山爆發(fā)) in 1883. It was 180 dB, 160km away.
Limit: 168 dB
根據(jù)短文內(nèi)容，回答問題

  1. 1.

    At what temperature will your cells die?
    ________________________________

  2. 2.

    What will happen if you eat a teaspoon of pure capsaicin?
    ________________________________

  3. 3.

    How fast can a runner run at most?
    ________________________________

  4. 4.

    What sound can be heard by your ears?
    ________________________________

  5. 5.

    Where can you read such an article?
    ________________________________

1. At 0℃
2. I won’t be able to eat anything else for a few hours
3. 43.06km/h
4. Sound which is lower than 168dB
5. In a science magazine
1.根據(jù)短文中0℃. Ice would form in your tissues(纖維組織), killing all the cells.可知
2.根據(jù)第二段If you’re healthy enough, you can survive(存活) eating a teaspoon of pure capsaicin. But you would find it impossible to eat anything else for a few hours.可知
3.根據(jù)Top runners are at their fastest around 80 metres, so a runner’s greatest speed may reach 43.06km/h.可知
4.根據(jù)The loudest sound you can hear is 168 dB(分貝)可知     
5.考查對(duì)全文理解，不難得出結(jié)論這是摘自科技雜志的文章
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：初中英語 來源： 題型：閱讀理解

閱讀短文，根據(jù)短文內(nèi)容簡(jiǎn)要回答問題。（每小題2分）請(qǐng)根據(jù)答案填寫到第7頁答題區(qū)內(nèi)指定位置。

Do you think that French fries are really French? French fries are called "pommes frites" in France and they are not from France. French fries come from Belgium(比利時(shí)) originally. French fries are made of potatoes, and they are cut and fried. The fried potatoes are called French fries because they were fist seen by Americans in Belgium, but they were fried in the French way. The French way is to fry potatoes twice with a small pause in the middle.
During World War I, there were a lot of hungry American soldiers in Northern France and Belgium. They ate French fries in Belgium. After the war was over, the soldiers went back home to America. However, they missed French fries so much that they made French fries at home. That's how French fries were fist introduced to America.
French fries were called Belgian fries once, but the name was finally changed to French fries. Sometimes French fries are just called fries.
French fries are one of the most popular potato foods in America. American fast food restaurants such as McDonald's and Burger King have French fries on their menus. French fries are freshly fried, and usually served with hamburgers.
If you visit any fast food restaurant in America and order a hamburger, you will probably hear "You want fries with that?"Why don't you think about the history of French fries a little while, and say "Yes, please. Thank you."
【小題1】What are French fries made of?
______________________________
【小題2】Where do French fries originally come from?
______________________________
【小題3】Why are the fried potatoes called French fries?
______________________________
【小題4】Who first introduced French fries to America?
______________________________
【小題5】What does the underlined "that" in the last paragraph refer to?
______________________________

查看答案和解析>>

科目：初中英語 來源： 題型：閱讀理解


閱讀下面對(duì)話，從方框內(nèi)7個(gè)選項(xiàng)中選擇5個(gè)恰當(dāng)?shù)木渥油瓿纱藢?duì)話。
A. How much are they ?
B. Would you like to go with me ?
C. To the flower shop.
D. Can you go with me ?
E. What kind of flowers do yo0u want to buy ?
F. What are you going to do there、
G. Can I help you ?
A: hello， Wanghai! Where are you going ?
B:  【小題1】.
A: To flower shop ?   【小題2】.
B: Don’t you know tomorrow is the se3cond Sunday of May ?
A: Oh, I remember! Tomorrow is Mother’s Day！
B; Yes, you’re right.   【小題3】.
A：Of course, I’d like to. Let’s go to the sop together.
(At the shop)
B:  【小題4】 
A: I think carnations are the best. What do you think ?
B: That’s great. I agree. Let’s choose some fresh ones.
A and B:   【小題5】 .
Saleswoman: They are 50 yuan in all.

查看答案和解析>>

科目：初中英語 來源：2012-2013學(xué)年江蘇省常州市七校八年級(jí)上學(xué)期12月聯(lián)考英語試卷（帶解析） 題型：閱讀理解


An old farmer lived with his little grandson. Every day the farmer got up early to read books.
One day the grandson asked, “Grandpa! I want to read books just like you, but I don’t understand them. What are the advantages of reading?” The grandfather said, “Take this litter basket to the river and bring me back a basket of water.” he boy did, but all the water leaked out before he got back to the house. The grandfather laughed and said, “ You’ll have to walk faster next time.”
This time the boy ran faster, but again the basket was empty before he returned home. The boy said, “ See Grandpa, it’s useless!”
So you think it is useless?” the old man said. “Look at the basket.”
The boy looked at the basket and for the first time he realized that the basket was different. It was clean, inside and out.
“That’s what happens when you read books. You might not understand or remember everything, but when you read them, you will be changed, inside and out.”
【小題1】The grandfather got up early to __________.

A．repair a basketB．do farm workC．wake up his grandsonD．read books
【小題2】The underlined phrase “l(fā)eaked out” means “______” in Chinese.
A．出現(xiàn)B．保留C．漏出D．爆發(fā)
【小題3】The passage might be written for ___________ to read.
A．children who like asking questions
B．children who like playing with water
C．children who dislike farming
D．children who dislike reading
【小題4】 The basket was ________ in the end.
A．lightB．cleanC．uselessD．dirty
【小題5】 What can we know from the passage?
A．The old farmer might be changed by reading.
B．The old farmer played tricks on his grandson.
C．The little boy got a full basket of water at last.
D．The old farmer was angry when he saw the empty basket.

查看答案和解析>>

科目：初中英語 來源：2012-2013學(xué)年遼寧大連甘區(qū)初二上學(xué)期期中階段學(xué)習(xí)質(zhì)量檢測(cè)英語卷（帶解析） 題型：補(bǔ)充句子


A: Summer holidays will begin next month. Are you going back to your hometown?
B: No,  【小題1】 .
A: What are you going to do?
B: Mum will take me to Beijing.    【小題2】  
A: She will be very happy to see you.
B: Yes, we haven’t seen each other for several years.
A:   【小題3】  
B: She is an English teacher. She is teaching in Beijing now. but last year she taught in Hong Kong.
A：  【小題4】 
B: Yes, she has. She likes traveling. So, she always moves to different places to work.
A: Is she going to work in Dalian?
B: Yes.    【小題5】 
A: That’s great.

A．Next year she is going to teach in our school.
B．We’ll meet my aunt there.
C．What does your aunt do?
D．I went back last summer holiday.
E.I don’t go there.
F.Is your aunt going to another place?
G.She has been to many places, hasn’t he?

查看答案和解析>>

科目：初中英語 來源：貴州省同步題 題型：填空題

根據(jù)句意和空缺處所給首字母寫單詞
1. E_________ me, what's your name, please?
2. Jim is eleven y_________ old.
3. —W_________ to Songtao, Guizhou!  
    —Thank you!
4. —How do you s__________ map?
    —M-A-P, map.
5. —What are t________ in English? 
    —They are erasers.

查看答案和解析>>

同步練習(xí)冊(cè)答案