欧美日韩黄网欧美日韩日B片|二区无码视频网站|欧美AAAA小视频|久久99爱视频播放|日本久久成人免费视频|性交黄色毛片特黄色性交毛片|91久久伊人日韩插穴|国产三级A片电影网站|亚州无码成人激情视频|国产又黄又粗又猛又爽的

Alone in the wilderness. Nothing but jungle. A world of shadow with the rays of light falling like blonde hair from the crowns of the giant trees. Jungle in the midday sun. Everything motionless. Not a sound from sky or earth. Complete silence. Only some coconuts falling, at long intervals, very far away. The world reduced to the soft touch of cool grass along my naked back, and a sweet smell of rich soil and vegetation. Stretched out with closed eyes beside my heavy burden of fruit and firewood, I enjoyed the feeling of fresh blood streaming through every part of my body and fresh jungle air filling every corner of my lungs.

???? Resting motionless, I could see the sun through my closed eyelids, alone in the sky, as lonely as I, and as motionless and silent as everything else. The earth had surely stopped turning and somewhere on this planet there was supposed to be roaring traffic in busy streets. What a crazy, unbelievable thought!

????????????? Another coconut fell, to make the world come to a complete standstill. I had to roll over onto my stomach to feel that at least I could move and make noises. Then I found company. A little brown ant was struggling to find its way with a bit of dry straw through the jungle of leaves and grass below my nose. I wondered if I could give the little fellow a lift with its burden, but it showed not the slightest sign of tiredness and struggled on with all six legs, head first or head last, waving its feelers energetically as if the trip had just started. Who ever saw a tired ant? Tiredness, disagreeable tiredness, is restricted to hunted animals, slaves and modern man. It is as great an effort for an office clerk to walk five blocks with a loaded brief-case as it is for a jungle-dweller to cross a valley with a goat on his back. It is as hard to get up and climb or run when you have been seated for years as it is to get up and walk when you have been in bed for months. The body is strange. Spare it, and you get really tired for almost nothing; use it, and almost nothing makes you really tired.

????????????? I rose to my feet. I had heard a horse neighing down in the valley. Above me, on the open highland plains, there were wild horses. But down in the valley there was never a horse unless there was a man on it. Somebody was making his way up the valley and my wife was alone.

1.What’s the right order of the following events?

① I heard a horse neighing down in the valley.

② I went to the jungle.

③ I found an ant carrying a bit of dry straw.

④ I lay on the ground to have a break.

⑤ I picked fruits and chopped firewood.

A. ②③⑤①④????????????? ????????????? B. ⑤③②④①????????????? ????????????? ????????????? C. ②⑤④③①????????????? ????????????? D. ⑤④③②①

2.How does the author feel about the ant?

A．He admired its attitude toward work.

B．He was amazed at its tireless efforts.

C．He showed sympathy for the little ant.

D．He was content to have it as a companion.

3.It can be inferred from the last paragraph that the author would probably ???????? .

A．work harder than before????????????? ????????????? ????????????? ????????????? ????????????? ????????????? B．talk to the man on the horse

C．make his way home????????????? ????????????? ????????????? ????????????? ????????????? ????????????? ????????????? D．stay in the valley

4.We can learn from the passage that the author ???????? .

A．enjoyed being alone?????????????

B．experienced a world of quietness

C．missed his busy life in the city

D．had an unforgettable adventure

The Royal Commission on Environmental Pollution has just published a report on new materials and has looked at the case of nanotechnology（納米技術(shù)）, which describes the science of the very small. Nanotechnology covers those man-made materials or objects that are about a thousand times smaller than the microtechnology（微電子技術(shù)）we use, such as the silicon chips of computers.

Nanotechnology gets its name from the nanometer, which is a billionth of a meter. There are about 600 consumer products already on the market that use nanotechnology. Nanomedicine is also being developed to fight cancer and other fatal diseases.

The Royal Commission found no evidence of harm to health or the environment from nanomaterials, but this “absence of evidence” is not being taken as “evidence of absence”. In other words, just because there are no apparent problems, this is not to say that here is no risk now or in the future. The commission is concerned about the pace at which we are inventing and adopting new nanomaterials, which could result in future problems that we are ill-equipped to understand or even find with current testing methods.

One of the problems about nanotechnology is that when we make something very small out of a well known material, we may actually change the functionality of that material even if the chemical composition remains the same. Indeed, it is not the particle（顆粒）size that should concern us, but its functionality. Take gold, for example, which is a famously inert (惰性) substance, and valuable because of it. It doesn’t rust or corrode because it doesn’t interact with water or oxygen. However, a particle of gold that is between 2 and 5 nanometers in diameter becomes highly reactive. This is not due to a change in chemical composition, but because of a change in the physical size of the gold particles. How can a change in size result in a change of function? One reason is to do with surface area. Nanoparticles have relatively a much bigger surface area. It is like comparing the surface area of a basketball with the total surface area of many pea-sized balls with the same weight of the single basketball. The pea-sized balls have a surface area many hundreds, indeed thousands of times bigger than the basketball, and this allows them to interact more easily with the environment. It is this increased interactivity that changes their functionality—and makes them potentially more dangerous to health or the environment.

1.Why does the writer mention microtechnology in the first paragraph?

A. to introduce the topic of nanotechnology

B. to help us better understand nanotechnology

C. to help us know more about microtechnology

D. to compare microtechnology with nanotechnology

2.The example of the “gold” in the last paragraph is intended to show that_________.

A. gold is valuable because it is an inert substance

B. an inert substance like gold doesn’t interact with water or oxygen

C. the function of gold is steady because it is an inert substance

D. the function of gold changes when made into something very small

3.Which process explains that there might be risks in nanotechnology?

A. expand surface area →increase interactivity → change functionality→cause possible dangers

B. expand surface area → change functionality → increase interactivity →cause possible dangers

C. increase interactivity → expand surface area → change functionality→cause possible dangers

D. increase interactivity → change functionality → expand surface area→cause possible dangers

4.What does the passage mainly focus on?

A. the introduction of nanotechnology and its wide use

B. the present use of nanotechnology and its future

C. the potential danger nanotechnology may bring us

D. the proposal to stop nanotechnology due to the potential danger

閱讀下列短文，根據(jù)以下提示：1）漢語提示，2）首字母提示，3）語境提示，在每個空格內(nèi)填入一個適當(dāng)?shù)挠⒄Z單詞，并將該詞完整地寫在右邊相對應(yīng)的橫線上。所填單詞要求意義準確，拼寫正確。

I feel very happy to receive your letter and here I'd like to give you some a?????? on how to learn English．Above all, don't lose your heart. Many students find it _______ to learn English，especially _______ write good English compositions．In my opinion, if you want to _______（改善）your writing, you should learn by heart as many English expressions and sentence p?????? as possible．And at the same time try to use _______ in your compositions．I think just r?????? grammar rules is no use. And only by reading and writing a lot_______ you be able to learn English well in an effective way．I definitely _______（相信） the most important thing is that you should _______ writing every day and never give up．

當(dāng)今許多家長不僅要求孩子刻苦學(xué)習(xí)功課，而且還要求他們學(xué)習(xí)諸如音樂、舞蹈、書法、美術(shù)、棋類等各種特長，希望孩子未來能更成功。對此現(xiàn)象的利弊、得失眾說紛紜。請你根據(jù)下面提示要點寫一篇短文并闡述自己的觀點。

益處：發(fā)展多種技能,培養(yǎng)多種愛好, 豐富生活；開闊視野，完善自我；增加就業(yè)機會

弊端：孩子自我支配時間少； 壓力更大； 加重家庭經(jīng)濟負擔(dān)等

你的觀點： ……

注意：

1.詞數(shù)120左右；短文的開頭已經(jīng)給出，不計入總詞數(shù)。

2.參考詞匯： horizon視野

Many parents are trying to find tutors to teach their children special skills such as music, dancing, calligraphy, painting, chess and so on,?

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

________________________________________

Peter has gone to Beijing, but I’m wondering why he ________ in such a hurry.

A. left?????????? B. has left??????????? C. leaves????????? D. was leaving

—I’m sorry I broke your mirror.

—Oh,really?_________.

A. It doesn’t matter      B.It’s OK with me

C .Don’t be sorry        D.I don’t care

 As I______ the little grass house in the forest, my heart beat more and more quickly.

A. approached    B. walked    C. ran       D. stepped

As far as I know ,the sports meet has been_________until next week because of the bad weather.

A.put away           B.put down????? C.put back           D.put off

Mr Black is the professor_________I have the greatest respect.

A.to whom              B.for whom???? C.whom              D.who

They are_________ to eat Chinese food though they have been in America for years.

A.    interested          B.please? C.? content         D.fond