初中英语说明文思维导图最新20篇

The quick and easy access to the Internet hasbrought much comfort and convenience to ourdaily life, and a growing number of people today prefer to do their purchase on line rather thanleave for the real shops.

Despite its obvious advantages, online shopping can also be a recipe for “troubles”. In thefirst place, you can never have a real contact with the stuff you want to buy while shoppingonline as you do in a real shop. Thus, occasions are not rare when buy something that doesnot really fit you or suit you. What’s more, if you are not lucky enough, you are likely to betrusted into the hands of some dishonest sellers, bringing home fake goods.

In my perspective, we should first develop a better sense of judgment while doing onlineshopping, and at the same time, more supervision systems are supposed to be built to ensurea more reliable and pleasant online shopping environment.

Li Hua spent too much time playing computer games and he fell behind

others. As a good friend of his, I must do something to help him.

Firstly, I think its very important for him to learn lessons well. He

should spend most of his time on his study instead of computer games. Secondly,

I must tell him that playing computer games too much is bad for his health,

especially for his eyes. So he must give it up. I can play more sports with him

after school. Maybe he will become more interested in sports than computer

games. And then Ill ask him to concentrate more on his study. Of course, I will

try my best to help him with all his subjects. I think I can do it in many fun

ways and let him find much fun in studying. At the same time, Ill ask both his

parents and our teachers to help him, too.

If I try these, Im sure he will make great progress soon.

Traveling is moer and more popular in the modern world.it helps us open our

eyes and learn knowledge differden places.so i thing traveling is helpful for

us.

When we are free during the holiday ,we can go to some beautiful places to

relax ourselves .w hile we are in different pleaces ,we will have a wonderful

feeling in all we see,there we can eat all kinds of delicious food,visit many

places of interest or something else.

On the other hand ,traveling will help us learn lots of local cultures

,people’s lives there ,sometimes you can make some new friends,it also can make

your life colorful.to us students mwe can relax ourselves from the busy studying

life,we can use these experiences in our studying.

So if you have time ,traveling is the best way to relax yourself the more

places you travel,the mare you will learn.

Today, many people, especially young people, are phone freaks. They are addicted to their mobile phones. They always spend too much time chatting or watching movies on their mobile phones. They have less time to communicate with their friends and family members. They often feel anxious without mobile phones.

Depending on mobile phones too much is a kind of illness. Its bad for health. Looking at the mobile phones too often is bad for our eyes. Playing with mobile phones is a waste of time and gets in the way of study.

Phones can help us communicate more easily and know more about whats happening around the world. If we can use them at proper time and proper situations, they can help us have a better, happier life.

An Activity

Someone said here Lei Feng comes in March and goes in April. I thought they were wrong. This afternoon the students of our class went to the bus stop to help the drivers clean the buses.

As soon as the bus stopped at the station, a group of students got on it. Some cleaned the windows, some swept the floor, and others cleaned the wall inside. We worked hard while talking and laughing. When we found some coins lying on the floor, we picked them up and gave them to the conductors or the drivers.They were very happy and said, "It is very nice of you."

When I got home, it was five o’clock. I felt a little tired, but I was very happy to have done a good deed.

[初中初二英语作文

Recently, we have little time to keep close contact with nature. We spend

too much time on study or working. We almost forget that how green the grass is,

how beautiful the flowers are, and how sweetly the birds are singing outside our

windows. A saying goes, "All work and no play makes Jack a dull boy". It means

that we need to relax ourselves and go out to breathe more fresh air. We can

also climb a hill in the suburbs.Its good for our health.

Lets go outing.

On the thirty, is the new years day, everywhere permeated with a festive atmosphere. Everybody happily sit together to eat dinner, I love to eat fish balls on the table, my sister and brother Sweet and Sour Spare Ribs favorite, favorite braised fish in soy sauce. After the dinner, my brother and sister began to set off firecrackers and fireworks. At this time, I brought a carefully lit fireworks, fireworks, and for a while a green spray, spray red, while spraying purple, is really fun.

My sister brought the firecrackers, the "popping" and "shout shout" sound like thunder, scared us everywhere escape. Brother of fireworks and crackers, is even more magical, while fly to the sky, while flying on the roof of the night dressed as the day, we see dazzling.

Just as we are playing vigorously, "when Dangdang, Dangdang", the bell of zero hour is ringing, the new year begins. Lets all wish the happy new year and the happy family together.

Many years ago, I saw a science fiction film, which described a future

world. The way people lived was very different. They could drive cars in the

sky. Everything in the future world was so convenient. Since then, I was always

curious about how the future world would become. The fling cars seemed so

ridiculous for now, but thinking about more than 100 years ago, people never

thought about flying in the sky, but now we could take planes and traveled

around the world. Everything was possible. Whats more, the development of

technology is so fast that the world changes so much every ten years. Nowadays,

people can pay the bill online. No matter where they go, a cell phone can solve

most problems. I believe that future transportation will be much efficient and

will surprise us all.

Love is everything. Love is the most brilliant thing in the world. Because

of love, our world turns out to be a sunny place.

We couldnt go without love. For instance, love can help us communicate

with each other very well, love can help us overcome all the difficulties, love

can help us get rid of our unhappiness, love can turn our enemies into our

friends, and our destinies can also be changed by love.

Whats more, love is a bowl of rice for a hungry beggar, love is an

overcoat for a tramp in winter days, love is an umbrella for us in raining days,

love is a stick for the old, love is the best medicine for the sick, love is the

sunlight for the blind, and love is the gospel for the deaf. Without love, our

world is meaningless.

However, love isnt a bunch of flowers or a nice present. Love is a thread

in our coat. Love is inside, making our life warm and comfortable.

在一个新的环境中自我介绍，是将我们更好地展现在大家面前的一种方法。

初中英语作文 自我介绍

根据以下要点提示写一篇60-80词的短文。

1、在学校学习汉语、英语、数学、历史和一些其他学科；

2、我学习很努力，最喜欢的学科是英语，经常找机会练习英语；

3、现在中国已经加入世贸组织wto，并且2008年奥运会将在北京举行，英语正变得越来越重要；

4、我将更加努力学习英语，将来为祖国作贡献。

I study Chinese、English、maths and History and some other subject at school.I study hard. My favorite subject is English.I often find chance to practice English.China has joined WTO and Beijing will host the 2008 Olympics,English is more and more important .I will study hard and be dedicate to my homeland.

同学们有没有准备好自己的自我介绍呢？这可是一个很好的表现的机会哦！

初中英语写作范文：保护眼睛

眼睛对我们很重要，同学们一定要很好的保护自己的眼睛哦。

Xiamen is Chinas first four special economic zones,it is

Taiwanese,southern Jiangxi,southern Hunan to the east to the sea,the Pacific Rim

will be developed into an international harbor.

"City at sea,the sea in the city," Xiamen is a graceful charm of the "Sea

Garden." Island,reef,rock,temple,flowers,wood backed each other,the hometown of

overseas Chinese customs,practices Fujian and Taiwan,coastal cuisine,exotic

blend of construction,year-round spring weather is more of the charm of the sea

icing on the cake.Beautiful scenery and pleasant weather,it can be said here is

the best environment for cities.Surrounded by sea water,broad sandy beaches,warm

sunshine,as a good ecological environment,Xiamens clean air,a habitat for

hundreds of thousands of egrets,Xiamen has formed a unique natural

landscape,since ancient times,Xiamen Egret is one of the major habitats,so

Xiamen Also known as "Lu Dao"; in addition to the beautiful natural

scenery,Xiamens urban environment is also very clean,is well-known tourist

city.

The news that Mr Cai had passed away was known, and I fell into great

sorrow. The sound of the rain knocking on the window was so mournful that it

deepened my distress.

My memory brought me back to the class when I saw him for the last

time.

That evening it was raining, too. We started our lesson as usual at a

quarter past six. I sat in the first row, and I saw Mr Cai press his stomach

with a hand from time to time, but I didn’t know the reason then. The two hours

passed quickly. When the lesson came to an end,Mr Cai told us that he had

possibly developed a stomach cancer, and would go to Beijing to see a doctor. If

there was nothing serious, he would continue to teach us after he came back. He

was very calm and his voice was steady. He still gave us some homework. He said

that he would mark the papers as soon as he came back.

Then I started to wait for his return. I had not thought that I would not

see him any more. The cancer had taken his life, even though he was still

young.

Mr Cai’s words are still ringing in my ears,“I hope you will be one of the

best students.” I think I should work hard at English and live up to his

expectation .

I have lost a good teacher. Tears will dry up in time, but the memory will

stay for ever.

这几天，我和妈妈一起去了西安。西安古色古香的景色真是让人过目不忘，我带你来看看吧。

第一天，我和妈妈一起去看秦兵马俑。

我早早就听说过秦始皇兵马俑的雄伟和壮观，但是不亲临其境还是难以体会到这种叹为观止的壮丽。

我从课文中了解到：兵马俑规模宏大。已发掘的三个俑坑，总面积达19120平方米，足有两个半足球场那么大，坑内有兵马俑近8000个。在三个俑坑中，一号坑最大，东西长230米，南北宽62米，总面积有14260平方米，坑里的兵马俑也最多，共有6000个左右。一号坑上面，现在已盖起了一座巨大的拱形大厅。走进大厅，人们无不为兵马俑的恢宏气势和高超的制作工艺所折服。站在高处鸟瞰，坑里的兵俑，马俑相间，一行行，一列列，十分整齐，排成了一个巨大的长方形军阵，看上去真像是秦始皇当年统率的一支南征北战，所向披靡的大军。真的是这样的吗?我怀着疑问去参观秦兵马俑。

我们一进大门口，就匆匆赶到了一号坑。我刚刚迈进一号坑，就被这雄伟壮丽的场景惊呆了。这成千上百的兵马俑密密麻麻，整整齐齐的排列在坑内。我们依次看到了将军俑，武士俑，骑兵俑，兵车俑，弓弩俑和马俑。他们个性鲜明，神态各异，千人千面，没有一个是重复的，真是让我大吃一惊。我听导游说，兵马俑的靴子前面翘的程度能看出他们的官职，靴子前面翘的越高就代表官位越大。这个小知识，我还是头一次听呢!

我们依次观看了1，2，3秦兵马俑展厅，我获得的知识可真不少，比如兵马俑这么高大，以前的人也长得这么壮实吗?其实不是，秦始皇希望自己的军队可以人强马壮，所以他把希望体现在了兵马俑上。

兵马俑雄伟壮丽，所向披靡，其中还有很多的奥秘等待我们去探索。

大学英语四级考试，即CET-4，College English Test Band 4的缩写，是由国家教育部高等教育司主持的全国性教学考试。下面是由小编为你精心编辑的大学英语四级作文模板：现象说明文，欢迎阅读！

英语四级现象说明文写作要点：

1、第一段，描述存在的现象，引起话题。

2、第二段，承上启下，解释这一现象的原因(原因一、二、三)

3、第三段，给出自己的观点(观点一、二、三)，总结结论。

英语四级作文模板

Recently _______,what amazes us most is______________,it is ture that__________.

There are many reasons explaining__________________________.The main reason is____________________.

what is more_________________________.thirdly__________________________.As a result_______________.

Considering all there,________________________.For one thing_____________________,for another____________.In Conclusion____________________.一种事物或现象(负面意义倾向)

Time spent at a university is a most worthwhile period in a young persons

life. This is a time when a student begins to form his or her ideas about life

in general. Attending classes and studying in the library keep a student busy

and provide him or her with access to valuable information， adding to his or her

knowledge base.

Campus life can also be rich and colorful. Most universities offer a

variety of extracurricular activities such as sports events， contests， and other

social gatherings， enabling the students to experience relief from study and

homework. Students often form lifelong friendships through the varied

experiences of university life.

During the time a student spends at university， he not only develops his

intellectual abilites，he also develops social skills as well as knowledge and

wisdom necessary for choosing a future career. By learning how to balance

intense study and recreation， a student will be well prepared for the challenges

of future responsibilities.

1. Today is very hot; I just have to stay at home all day. I watched TV after finishing my homework. The program was called animal planet. It was wonderful. It was about the beautiful nature and animals on the earth.

I enjoyed very much and learned a lot from it. I also ate water melon, which was great.

2. Today is hotter. I wanted to stay at home, but my father told me to do some exercises. He asked me to go shopping. I bought some food and drinks, and some vegetables. My mother praised me. I was hot and sweaty, but I was happy then.

3. Today is rainy. I went out with my friends. We went to the shopping mall, restaurant, and cinema. It was an exciting and amazing day. I bought many things I like, had a good meal and nice talk with my friends, and enjoyed a very interesting movie.

4. Today is hot again. My father is free. I asked him if we could go swimming, and he agreed. We went to the swimming pool. There were many people. I like swimming, though I am not very good at it. My father taught me a lot. He is very kind and patient. We enjoyed there very much. It is really a fruitful day.

5.Today is cloudy, but still very hot. I stayed at home, finished my home work and watched a movie, which is called illusionist. It is difficult to understand at the beginning, but I got to know it and enjoyed later then. It is a story happened in the 19th century in Europe, which is about love, trick and ambition among a magician, his lover in his childhood and the lover’s husband. You could only know it at the very end of the story.

6. Today is sunny and hot. I do nothing but surf on the internet, chatting with my friends, playing computer games and listening to the music. It is boring somehow. However, I found some nice music. I like pop music, folk song, rock music and light music. I downloaded them to my MP3 and enjoyed it when I resting on the bed.

7. Today I went out with my friends because it is not so hot. We went shopping, chat together, and had nice drinks and creams. Summer holiday is long, but the happy time is always short and memorable.

8. Today I went to see my grandparents with my mother. They are healthy and kind. We had a wonderful meal there. They usually do exercise in the early morning and have a walk after dinner. I should do more exercises, which is good to my health. Maybe I should lose some weight.

9. Today I only played cards and chess on the internet. I won a lot, which made me very happy. Internet is very useful and enjoyable. People could connect to each other by it, though I thought people communicate to each other less than before in reality. A coin has two sides.

10. Today I started to read a book called “The pride and the prejudice”, which is a famous novel. It is very interesting. It is delightful that the two couples get married as their wishes at last. However, it is difficult for me to describe the details to you. I think you should read it by yourself.

下面是语文迷为大家整理的常用的英语短语集锦，希望对大家写英语作文有所帮助。

一、动词+介词

1.look at…看…， look like … 看上去像……， look after …照料…

2.listen to…听…… 3.welcome to…欢迎到……

4.say hello to …向……问好 5.speak to…对……说话

此类短语相当于及物动词，其后必须带宾语，但宾语无论是名词还是代词，都要放在介词之后。

二、动词+副词

“动词+副词”所构成的短语义分为两类：

A.动词(vt.)+副词

1.put on 穿上 2.take off脱下 3.write down记下

此类短语可以带宾语，宾语若是名词，放在副词前后皆可;宾语若是人称代词，只能放在副词前面。

B.动词(vi)+副词。

1.come on赶快 2.get up起床 3.go home回家

4.come in进来 5.sit down坐下 6.stand up起立

此类短语属于不及物动词，不可以带宾语。

三、其它类动词词组

1.close the door 2.1ook the same 3.go to work/class 4.be ill 5.have a look/seat 6.have supper 7.1ook young 8.go shopping 9.watch TV/games 10. play games

[介词短语聚焦]

“介词+名词/代词”所构成的短语称为介词短语。现将Unitsl-16常用的介词短语按用法进行归类。

1.in+语言/颜色/衣帽等，表示使用某种语言或穿着……。

2.in + Row/ Team/ Class/ Grade等，表示“在……排/队/班级/年级”等。

3.in the morning/ afternoon/ evening/ 表示“在上午/下午/傍晚”等一段时间。

4.in the desk/ pencil-box/bedroom 等表示“在书桌/铅笔盒/卧室里”。

5.in the tree表示“在树上 (非树本身所有)”;on the tree表示“在树上(为树本身所有)”。

6.in the wall表示“在墙上(凹陷进去)”;on the wall表示“在墙上(指墙的表面)”。

7.at work(在工作)/at school(上学)/at home(在家)应注意此类短语中无the。

8.at + 时刻表示钟点。 9.like this/that表示方式，意为“像……这/那样”。

10.of短语表示所属关系。 11.behind/ beside/ near/ under+ 名词等，表示方位、处所。

12.from与to多表示方向，前者意为“从……”，后者意为“到……”。

另外，以下这些短语也必须掌握。如：on duty, after breakfast, at night, at the door, in the middle, in the sky, on one’s bike等。

[重点句型大回放]

1.I think…意为“我认为……”，是对某人或某事的看法或态度的一种句型。其否定式常用I don’t think…，

2.give sth. to sb./ give sb. sth. 意为“把……给……”，动词give之后可接双宾语，可用这两种句型;若指物的宾语是人称代词时，则只能用give it/ them to sb.

3.take sb./ sth. to…意为“把……(送)带到……”，后常接地点，也可接人。

4.One…, the other…/One is…and one is…意为“一个是……;另一个是……”，必须是两者中。

5.Let sb. do sth. 意为“让某人做某事”，人后应用不带to的动词不定式，其否定式为Don’t let sb，do sth.，或Let sb. not do sth. 另外，Let’s 与Let us的含义不完全相同，前者包括听者在内，后者不包括听者在内，

6.help sb. (to) do sth./help sb. with sth.意为“帮助某人做某事”，前者用不定式作宾补，后者用介词短语作宾补，二者可以互换. Help… out

7.What about…?/How about…?意为“……怎么样?”是用来询问或征求对方的观点、意见、看法等。about为介词，其后须接名词、代词或V-ing等形式。

8.It’s time to do…/ It’s time for sth. 意为“该做……的时间了”，其中to后须接原形动词，for后可接名词或V-ing形式。

9.like to do sth./like doing sth.意为“喜欢做某事”， 前一种句型侧重具体的一次性的动作;后一种句型侧重习惯性的动作，

10.ask sb.(not) to do sth. 意为“让某人(不要)做某事”，其中ask sb.后应接动词不定式，

11.show sb. sth. / show sth. to do. 意为“把某物给某人看”，该句型的用法同前面第2点。

12.introduce sb. to sb. 意为“把某人介绍给另一人”;introduce to sb.则是“向某人作介绍”。

[重点短语快速复习]

1.kinds of 各种各样的 2. either…or…或者……或者……，不是……就是……

3. neither…nor…既不……也不…… 4. Chinese tea without, anything in it 中国清茶

5. take a seat 就坐 6. home cooking 家常做法

7. be famous for 因……而著名 8. on ones way to在……途中

9. be sick/ill in hospital生病住院 10. at the end of在……的尽头，在……的末尾

11. wait for 等待 12. in time 及时

13. make one’s way to…往……(艰难地)走去

14. just then 正在那时 15. first of all 首先，第一

16. go wrong 走错路 17. be/get lost 迷路

18. make a noise 吵闹，喧哗 19. get on 上车

20. get off 下车 21. stand in line 站队

22. waiting room 候诊室，候车室 23. at the head of……在……的前头

24. laugh at 嘲笑 25. throw about 乱丢，抛散

26. in fact 实际上 27. at midnight 在半夜

28. have a good time=enjoy oneself玩得愉快

29. quarrel with sb. 和某人吵架 30. take one’s temperature 给某人体温

31. have/get a pain in…某处疼痛 32. have a headache 头痛

33. as soon as… 一……就…… 34. feel like doing sth. 想要干某事

35. stop…from doing sth. 阻止……干某事 36. fall asleep 入睡

37. again and again再三地，反复地 38. wake up 醒来，叫醒

39. instead of 代替 40. look over 检查

41. take exercise运动 42. had better(not) do sth. 最好(不要)干某事

43. at the weekend 在周末 44. on time 按时

45. out of从……向外 46. all by oneself 独立，单独

47. lots of=a lot of 许多 48. no longer/more=not…any longer/more 不再

49. get back 回来，取回 50. sooner or later迟早

51. run away 逃跑 52. eat up 吃光，吃完

53. run after 追赶 54. take sth. with sb. 某人随身带着某物

55. take(good) care of…=look after…(well) (好好)照顾，照料

56. think of 考虑到，想起 57. keep a diary 坚持写日记

常用英语短语

1. go to school 上学(用于专业的)go to the school 去学校(不一定是上学)

2. good way to 好方法

3. hate to do 讨厌没做过的事hate doing 讨厌做过的事

4. have a party for sb 举办谁的晚会

5. have a talk 听报告 谈一谈

6. have been doing 现在完成进行时eg : You have been talking You have been sleeping since

7. have been to …( 地方)……去过某过地方have gone to …(地方) 去了某地还没回来

8. have fun +doing 玩得高兴

9. have sth to do 有什么事要做

10. have to do sth 必须做某事

11. have trouble (problem) (in) doing sth 做什么事情有麻烦

12. have…time +doing

13. have…(时间)…off 放……假eg: I have month off 我请一个月得假

14. hear sb +do/doing 听见某人做某事/正在做某事

15. help a lot 很大用处

16. help sb with sth ones sth 帮助某人某事(某方面)help sb (to) do sth 帮助某人做某事

17. hope to do sth 希望做某事

18. How about(+doing) = What about(+doing)

19. how do you like = what do you think of 你对什么的看法

20. if : 是否=wether

21. eg: I dont know if (wether) I should go to the party 我不知道我是否应该去参加晚会

22. He dont know if (wether) we will arrive on time tomorrow morning 他不知道我们明天早上是否能准时到达

23. if :如果，假如(全部接一般时态)+条件语态从句

24. in ones opinion = sb think 某人认为

25. in some ways 在某些方面

26. in the end = finally(adv) 最后

How to protect the environment

Good environment can make people feel happy and fit . To improve the environment means to improve our life.

We should plant more trees and flowers around us . We shouldn’t cut them down . We should stop factories from pouring waste water into the river and waste gas into the air.

Whenever we see litter on the ground , we should pick it up and throw it into dusbins. Never spit in public. Don’t draw on public walls. It’s our duty to protect the environment.

①1782年4月，法国巴黎的一位采石工人劈开了一块巨大的石头，眼前的一幕让他惊呆了：石头里面藏着4只蟾蜍，它们竟然都还活着。石头被劈开后，这4只蟾蜍蹦了出来，看起来还很有活力。

②科学家对这里的石灰岩层进行了科学测定，证实它们形成于100多万年之前，也就是说这4只蟾蜍在石层中已经冬眠100多万年了。

③这件事让人们大为惊诧，这4只蟾蜍竟然能活100多万年！它们是怎么在这100多万年里保持着生命的活力的呢？

④我们谁都渴望长寿，可是人类和其他动物的寿命都是有限的。一只狗可以活15年到20年，一匹马可以活30年到40年。无论是人类还是动物，生命都是有限的。一般来说，人的生命极限为200至250年，而普通的蟾蜍的生命极限也只是10年。

⑤可是这4只小小的蟾蜍竟然能够挑战生命的极限，存活了100万年，这令人唏嘘不已。

⑥面对这样的生命奇迹，人们不禁要问：“在如此漫长的时间内，这些蟾蜍在没有食物、水和阳光的环境下，是怎么维持生命的呢？这些能生存百万年的老寿星们，它们是怎么修炼出长寿秘诀的呢？”

⑦有科学家分析说，可能是这些动物在冬眠的时候地壳发生了变动，它们所在的淤泥变成了岩石，这些岩石虽然看起来很坚固，其实存在着不少微小缝隙，所以水分和空气都能够进入岩石中，它们便可以生存了。但是，动物要维系生命，还需要一定的热量，尽管蟾蜍或青蛙在冬眠时热量消耗非常低，但它们自身的热量，无论如何也无法维持数千年甚至数万年之久啊！

⑧有科学家解释说，蟾蜍能经过上百万年仍有生命体征，得益于它们生存在一个保持“恒温”的环境下。封存它们的岩层或矿层就是这样一个恒温的环境。在这样的环境下，它们不会受到任何外界的刺激，天气阴晴冷暖、四季交替对它们都没有什么影响。蟾蜍实际上等于把生命贮藏了起来，不进行新陈代谢，不消耗能量，所以能长期不吃东西而不死亡。

⑨还有科学家认为，蟾蜍长寿是因为它们体内有一种甘油在起作用。美国的一位科学家就曾做过这样的实验：他先把几只快要冬眠的青蛙放到零下6度的环境中，一周之后，他给青蛙慢慢地提高温度解冻，并检查青蛙的肌肉成分，结果发现它们的肌肉中多了一种甘油。所以他认为，蟾蜍在冬眠时，由于体内产成了一种甘油，所以才能长久不死。

⑩另有一些科学家认为，上述解释都还不够充分。迄今为止，对于蟾蜍和青蛙如何长久维持生命的问题，科学家们还没有形成一致的结论。但随着生物科学的迅速发展，相信这个谜团最终会被解开，这可能还会对研究人类长寿问题有启迪和借鉴作用呢。

(选自2014年2期《学生天地 》初中版)

1.对于蟾蜍在没有食物、水和阳光的环境下得以长寿的原因，科学家有哪几种解释？请作简要概括。

2.选文第③段中加着重号的“这件事”指代什么？

3.选文第④段加线句运用了什么说明方法？有什么作用？

4.简析第⑩段加着重号的词语“可能”的作用。

参考答案：

1.①包裹蟾蜍的岩石存在着不少微小缝隙，水分和空气都能够进入岩石中，蟾蜍便可以生存了。②蟾蜍生存在一个保持“恒温”的环境下，不进行新陈代谢，不消耗能量，所以能长期不吃东西而不死亡。③蟾蜍在冬眠时，由于体内产成了一种甘油，所以才能长久不死。

2.4只蟾蜍在一块巨大的石头里活了100多万年。

3.用列数字的说明方法，真实具体地说明了一般动物的寿命是有限的。

4.“可能”表推测，说明蟾蜍长寿谜团被解开，也许对研究人类长寿问题有启迪和借鉴作用，“可能”体现出说明文语言的准确性、科学性特点。

What#39;s the meaning of a friend to you?

Maybe you think that a friend is someone who will listen to you when you#39;re filled with sorrow.

Maybe you think that a friend is someone who will give you a gift on your birthday.

But to me, a friend is someone I can rely on.

When I was eight years old, I met, my best friend, Jennifer. Her personality was different from mine.

She#39;s very resolute and brave. When I was sad, she was the person who would sit next to me, comforting me.

When I was happy, she was the person with whom I could share my joy. As of now, we have been friends for eight years.

Although we#39;re not classmates anymore, I believe that we#39;ll still be good friends tomorrow and forever.

以下是为大家整理的关于以中国的环境污染为话题的初中英语作文的文章，希望大家能够喜欢！

Directions:For this part， you are allowed 30 minutes to write a composition on the topic:

Pollution: An Increasing Concern in China You should write at least120 words following the outline below in Chinese.

1. 中国的污染的现状

2. 造成污染的原因

3. 解决的办法

Pollution: An Increasing Concern in China

It is reported that ten big cities in China are being ranked among the top twenty cities with the highest pollution index in the world. This means it is high time we did something to bring the situation under control.Many factors are contributing to the deteriorating situation: industrial wastes pumped into the air， the lakes and rivers; a increasing number of automobiles crowding into the streets; the widespread use of plastic bags etc.

To my view， stiffer laws and regulations must be implemented to check pollution. Industries that release wastes without permission should be heavily fined. Cars should be equipped to minimize the exhaust they release into the air. And the use of plastic bags and disposable meal boxes should be banned. What’s more， the media should play an important role in implanting a sense of environmental consciousness into people’s mind. If everybody works toward a common goal of making the environment better， we can create a cleaner and lovelier world for us and for the coming generation.