初中科技英語閱讀理解
1. 英語閱讀理解文章
This is not the world we know. This world is controlled by computers. Men and women can be seen, but they are following orders given to them by machines. The machines were designed by mad scientists, but at some point even the mad scientists were taken over by their super-inventions.
Does this sound familiar? You have probably read something like it in magazines or books, or seen it in a film. Why is it popular? One of the reasons is that it reflects the fears of many people; fear of the unknown, fear of what is not understood or, at least, fear of something that is not completely understood.
The fact is that every day it seems that computers take control of another area of our lives. Some factory jobs are now done by robots(機器人)and the robots are controlled by computers. Our bank accounts are managed by computers. At the airport, our tickets are sold by a computer. Certainly many of these operations are made more efficient by computers, but our admiration is sometimes mixed with unsafe feelings. And this lack of safety is caused by the fact that we do not know how computers do these things, and we really don』t know what they might do next.
But we can find out how computers work, and once we understand them, we can use computers instead of worrying about being used by them. Today, there is a new generation of computer wizards(奇才) who know exactly how computers get things done. These young men and women, usually university students, are happy to sit for hours, sometimes for days, designing programs, not eating, not sleeping,. But discovering what can be done by these wonderful slaves which they have learned to control. These computer wizards have learned to use the computer and search for new tasks for their machine.
2. 要5篇分類英語閱讀：動植物，人物，科技發明，中西方文化介紹（節日），地理知識。要5道練習題及答案
動植物:
Plants are very important living things. Life could not go on if there were no plants. This is because plants can make food from air， water and sunlight. Animals and man cannot make food from air， water and sunlight. Animals get their food by eating plants and other animals. Therefore animals and man need plants in order to live. This is why we find that there are so many plants around us. If you look carefully at the plants around you， you will find that there are two kinds of plants： flowering plants and non-flowering plants. Flowering plants can make seeds. The seeds are protected by the fruits. Some fruits have one seed， some have two， three or four， and some have many seeds. But a few fruits have no seeds at all. An example of a fruit without seeds is the banana fruit. Most non-flowering plants do not grow from seeds. They grow from spores(胚芽)。 Spores are very small. Some spores are so small and light that they can float in the air. We may say that spores are quite the same as seeds. When these spores are all on wet and shady places， they usually grow into new plants.
. The main idea of the first paragraph is that ______.
A. plants are important for life
B. plants cannot grow without air
C. there are many plants in the world
D. we can not live without water
2. Plants can make food from______.
A. flower， water and air
B. water， sunlight and air
C. air， water and soil
D. air， sun and light
3. What can we infer(推斷) from the passage ?
A. Of all living things animals are most important
B. Spores are seeds
C. All fruits of flowering plants have seeds
D. Without plants， man will die out
4. This passage may be taken from______.
A. a medicine book
B. a novel
C. a science magazine
D. an experiment report
5. The underlined word 「protected」 in the third paragraph can be replaced by ______.
A. damaged B. polluted C. prevented D. guarded
1-5 ABDCD
3. 求科初中技類英語閱讀題!!!!!!!!
At the beginning of last century, medical scientists made an interesting discovery that we are built of not just of flesh and blood but also of time. They were able to show that we all have a 「body clock」 __31__ us, which controls the __32__ and fall of our body energies, making us different from one day from the next.
The __33__ of the 「body clock」 should not be too surprising since the lives of most living things are controlled by the 24-hour night-and-day cycle(周期). We feel __34__and fall asleep at night and become __35__ and energetic ring the day. If the 24-hour cycle is disturbed, most people will experience unpleasant feeling. For example, people who are not__36__ to working at night can find that lack of sleep causes them to perform badly at work..
Besides the __37__ cycle of sleeping and waking, we also have other cycles which __38__ longer than one day. Most of us would __39__ that we feel good on some days and not so good on __40__; sometimes our ideas seem to flow and at other times, they just do not exist.
31. A. inside B. around C. between D. on
32. A. movement B. supply C. use D. rise
33.A. invention B. problem C. story D. idea
34.A. hungry B. tired C. dreamy D. happy
35.A. sad B. excited C. lively D. sleepy
36. A. made B. allowed C. expected D. used
37.A. daily B. weekly C. monthly D. yearly
38.A. live B. last C. stay D. keep
39. A. agree B. believe C. realize D. understand
40.A. other B. the other C. others D. another
Japan has a new craze: the virtual pet」 Tamagocchi. The new object of consumer desire is the latest in high-tech — an electronic bird creature, the size of an egg that has been sold everywhere and is now only available on the streets at more than 20 times its original (原來的)price of 11,980 yen or $16.
You can feed it, stroke (撫摸) it, carry it in your pocket and even take it to the bathroom—all with a push of a button. But be aware of that if you don』t take care of your Tamagocchi—Japanese word for 「lovely egg」— your pet will die before your eyes and before its time.
The Tamagocchi starts life as a bird-like image on the screen of an egg-shaped key-ring device. It changes from a chick to a fully grown alt in around 10 days. However, the owner must feed, clean and calm the digital(數字的) creature by pushing the proper buttons to prevent it from dying from neglect(忽視). The owner may choose to feed the creature digital sweets and enjoy its sound of delight by pressing buttons in response to the creature』s movements.
41. What』s the meaning of 「 the latest in high-tech」 according to the passage?
A. A bird creature fed by a child.
B. A bird creature controlled by electricity.
C. A bird creature controlled by electron.
D. A bird creature fed with sweets.
42. What is the present price of Tamagocchi?
A. About 180 dollars B. 60 dollars C. About 320 dollars D. 1,200 dollars
43. Which of the following statements is NOT true about Tamagochi?
A. It can grow up in around 10 days.
B. It has to be fed, cleaned and calmed in case it might die.
C. It can proce a sound of delight.
D. It can be bought everywhere now.
44. What is the best title for the passage?
A. A New Type of Pet.
B. Take Good Care of the Tamagocchi.
C. The Popularity of the Tamagocchi in Japan.
D. A Newly Found Bird—the Tamagocchi.
Some scientists say that animals in the ocean are increasingly threatened(威脅)by noise pollution caused by human beings..
The noise that affects（影響） sea creatures comes from a number of human activities. It is caused mainly by instrial underwater explosions（爆炸）, ocean drilling, and ship engines. Such noises are added to natural sounds include the breaking of ice fields, underwater earthquakes, and sounds made by animals themselves.
Decibels (分貝 measured in water are different those measure on land. A noise of one hundred and twenty decibels on land causes pain to human ears. In water, a decibels level of one hundred and ninety-five would have the same effect.
Some scientists have proposed（提議）setting a noise limit of one hundred and twenty decibels in oceans. They have observed that noises at that level can frighten and confuse whales（鯨魚）.
A team of American and Canadian scientists discovered that louder noises can seriously injure some animals. The research team found that powerful underwater explosion were causing whales in the area to lose their hearing. This seriously affected the whales』 ability to exchange information and find their way. Some of the whales even died. The explosion had caused their ears to bleed（流血）and become infected（感染）.
Many researchers whose work depends on ocean sounds object to(反對) to a limit of one hundred and twenty decibels. They say such a limit would mean an end to important instrial and scientific research.
Scientists do not know how much and what kind of noises are harmful to ocean animals. However, many scientists suspect(認為，懷疑) that noise is a greater danger than they believed. They want to prevent noises from harming creatures in the ocean.
52.According to the passage , which of the following is increasingly dangerous to sea creatures?
A. The man-made noises.
B. The noises made by themselves.
C. The sound of earthquakes.
D. The sound of the ice- breaking.
53. Which of the following is discussed in the third paragraph?
A. Different places with different types of noises.
B. The very human ears sensitive to all types of noises.
C. The same noise measured differently on land and in the ocean.
D. The animal』s reaction(反應) to noises.
54. As to the influence (影響)of noises on whales, which of the following statements is true?
A. They are deaf to noises.
B. Noises at a certain level may hurt them.
C. They are easily confused by noises.
D. Noises will limit their ability to reproce.
55. According to the passage, what will scientists most probably do in the future?
A. They will try their best to decrease(減小)noise.
B. They will work hard to cut down noise pollution.
C. They will study the effect of different noises.
D. They will protect animals from harmful noises.
第一個答案 ADDBC DABAC
第二個答案 CCDA
第三個答案 CACBD
絕對正確．
4. 科技英語閱讀理解2
98. D
99. D
100).A
5. 初中英語閱讀理解題型
初中英語閱讀理解題型
英語閱讀理解題是中考英語常見的題型之一,且佔比分較大,讓學生熟悉常見的題型,掌握正確的答題技巧及解題步驟,可收到"事半功倍"的效果。下面就由我來跟大家介紹一下初中英語閱讀理解常見題型及答題技巧吧!
【初中英語閱讀理解題型及解題技巧】
(一)主旨題
主旨題主要考查學生對短文中心思想或作者意圖的掌握。做此類題時，應通讀全文，理解文章大意，充分理解主題句的意義。短文往往圍繞主題句展開，主題句通常出現在短文第一句或最後一句。
(二)細節題
細節題是用來進一步表達主題，體現中心思想的，往往針對短文某個細節來設題。做此類題時，應快速捕捉信息，可能是一些事例、數字等，閱讀時要有針對性。
(三)推斷題
推斷題就是根據某個事實推斷結論，主要考查學生的理解力和推斷力。這類推斷通常包括：數據事實推斷、常識推斷以及作者的寫作目的、態度和傾向等的推斷。做此類題時，應根據短文中的相關語句，對與事實有關的細節加以分析，找出線索，悟出字里行間的意思，反復比較，從而作出合乎邏輯的判斷。
(四)猜測詞義題
猜測詞義題主要考查學生根據上下文正確判斷靈活變化的詞義能力。一般情況下，推斷詞義的題目中所出現的單詞，大多數是學生未曾見過的生詞，學生需要在該詞出現的上下文中去尋找線索。通過閱讀上下文，斷定該詞的真正含義，然後將這個釋義代入文中，檢查是否貼切，仔細比較直到得出該詞的確切的含義。
(五)正誤判斷題
正誤判斷題主要考查學生對文章的具體事實、信息的理解能力。一般是根據文章的事實或細節，給出一個句子，判斷其正誤。這類題比較直接，難度相對較小。做此類題時，應先看題，後帶著“問題”快速閱讀短文，尋找所需要的信息。 初中英語閱讀理解題已成為評估學生英語水平的重要測試題型，在中考英語試卷中所佔比重較大。閱讀理解題主要是考查學生綜合運用所學語言知識的能力，包括細節理解能力、詞義判斷能力、歸納概括能力及邏輯推理能力等。大致來說，閱讀理解題主要針對如下方面：
(1) 個別詞語或句子;(2)某一細節或情節;(3)主題;(4)背景知識;(5)結論或結局;(6) 內涵隱意或寓意等。下面本人就根據閱讀理解題的題型特點，來談一些答題技巧。
一、直接理解題
這種題目比較簡單，只要通讀全文，了解文中所敘述的重要事實或細節就可以解答出來，有的甚至可以從文章的原句中直接找到答案。此類題目的出題形式很多，例如：
(1)Which of the following statements is true / false?
(2)Which of the following is(not)mentioned?
(3)How many / How much / Where / How / What„„?
(4)What does the writer think about?
(5)Which is the right order of the events given in thepassage?
要快速辨認和記憶事實或細節，就需要恰當地使用查閱的方法。查閱是讀者在對材料有所了解的情況下進行的，它的特點是帶著問題去尋找答案，往往與略讀綜合使用，具體方法與步驟如下：
(1)略讀材料，了解原文大意，掌握其中心意思或主旨。
(2)按文章的體裁、作者寫作的組織模式及有關信息詞，如for example，first，second„„預測應該到何處尋找自己所需要的事實。
(3)將自己的精力放在尋找所需要的細節上，快速通篇閱讀，眼睛自左至右、自下而上呈Z形掃視，待找到含有相關細節的句子時，就要放慢速度，仔細核對，比較內容，直至找到答案。
二、語義理解題
在閱讀中，我們經常會遇到一些生詞，需要根據上下文猜測它們的意思。此類問題考查學生緊扣原文，根據上下文語境判斷單詞、詞語或短句意義的能力。常見的題型有：直接對生詞進行解釋;對多義詞或短語在文章具體語言環境中的意義作出准確判斷;對英語中的一些格言或諺語進行解釋;對文中一些代詞的指代對象作出界定等。這種題型常見的設題方式如下：
(1)The underlined word(phrase)in the passage means______.
(2)The word“it/them”in the first paragraph refers to______.
(3)The underlined sentence in the last paragraph means____.
(4)What does the underlined word“„”refer to______.
(5)By „ the writer means______.
在做此類題時，考生應緊扣原文，根據上下文語境進行判斷，切不要望文生義或斷章取義，也不能只選擇自己熟悉的意思。猜測詞義的常見方法有：
1)根據構詞法猜測詞義;
(2)根據上下文猜測詞義;
(3)根據定義或解釋猜測詞義;
(4)根據同義詞、反義詞以及對比關系猜測詞義;
(5)根據生活常識猜測詞義。
三、邏輯推理題
推理判斷試題屬於深層閱讀理解題。它要求考生盡量考慮文中全部信息或事實，在通篇理解文章的基礎上，嚴格按照作者提供的信息推斷出作者的言外之意。這種題型常見的設題方式有：
(1)From the text，it can be inferred that______.
(2)The passage suggests that______.
(3)Which of the following best describes______.
(4)The writer’s attitude towards„is______.
(5)From the text，we learn that______.
這種題目有一定難度，解答時必須根據上下文及相互間的關系或對整篇文章進行深層理解後，才能找到答案。有時甚至還得聯系作者的意圖、態度等文外之意加以推理。解此類題目可從以下幾方面入手：
(1)根據常識判斷。即解題時，除弄清文意外，還需藉助生活常識、風土人情、傳說掌故、名人軼事等進行判斷。
(2)根據知識判斷。即解題時，運用一些一般性知識，如天文、地理、文學、藝術、科技等自然科學和社會科學知識。
(3)根據計算判斷。即解題時，運用一些數學知識進行和差、面積、體積、速度等方面的運算。
(4)根據情節判斷。即解題時，從情節所提供的基本事實出發，尋找一定規律，如時間關系、條件關系、因果關系、比較關系、轉折關系等作為推理根據。這種題目最容易出現，考生要從時間、地點、事件的情節安排與發展中，深入探討其邏輯關系及隱喻、引申等因素。
四、歸納總結題
這種題型要求學生在理解全文的基礎上，對文章進行歸納、概括或評價。解這種題目時，不能只憑文中的只言片語而斷章取義，如涉及文章的標題(title)、主題(main idea)、結論(conclusion)、結局(end)等有關問題，都需要在細讀全文的基礎上，結合所學語言知識進行邏輯思維、推理、判斷，從而獲取文章中的內在信息。常見的設題方式有：
(1)The general idea of the passage is about______.
2)The main idea of the article is______.
(3)The main purpose of this selection is______.
4)The passage suggests that______.
5)Which of the following best states the theme of thepassage?
具體解題時，應注意一些技巧：
(1)首先看短文的開頭和結尾，確定短文題材，預測其內容。每段的第一句話往往會提供重要信息，可以幫助我們搜索各段落乃至整篇文章的大意。
(2)速讀全文，整體理解短文大意，抓住關鍵詞語，弄清文章的主旨。
(3)根據已知短文內容，著手解題。可先將文後的選擇題看一下，然後帶著問題再去閱讀。這樣做，一方面有助於對文章進一步理解，另一方面可以有針對性地從文章中尋找答案。
(4)迅速復讀全文，檢查自己的理解是否正確，所選答案是否前後矛盾。通過全面考慮，最後確定答案。
一.教學大綱對閱讀理解的要求
(一)初中英語教學大綱對學生閱讀上的基本要求：
1.能閱讀難度相當於課文的材料，理解其大意。
2.能獨立閱讀所學語言知識范圍內的材料，生詞率不超過3%。
3.閱讀速度要求每分鍾50-70詞。
(二)中考閱讀理解的考點
1.文章的話題—略讀文章，領會文章大意的題。
2.文章的中心題—歸納，概括的能力。
3.文章的細節—掃讀或細讀文章，以獲得某些特地信息或准確的尋找所需細節的能力。
4.文章的寓意，結論-領會作者的言外之意或推斷出文章的結論。
5.生詞詞意，猜詞—對生詞詞意的判斷能力。
(三)中考閱讀理解考察的文體
1.記敘文—抓住人物，地點，時間，情節發展線索。
2.說明文—要以事物為中心進行思考。抓住事物的特徵，用途，相互關系等。
(四)解題思路與技巧
1.快速瀏覽全文，掌握大意。
2.仔細審題，分析比較選項 。
3.帶著問題復讀，捕捉關鍵信息，解答問題。
4.再讀全文，核對答案。
二.閱讀理解題型及解題技巧
從近幾年的中考閱讀理解情況看，短文體裁多樣，題材各異，文章涉及科學知識、社會文化、政治歷史、人文環境和日常生活等方面，
充分體現其時代性、實用性。短文難度逐年加大。常見題型有主旨題、細節題、推斷題、猜測詞義題和正誤判斷題。
做閱讀理解練習應先看問題，弄清考點。在閱讀短文之前，快速瀏覽問題，以便在閱讀短文時做到心中有數，快速、准確地捕捉所要信息。先易後難。做題時不必拘泥於書中所呈現的語篇順序，應遵循先易後難的原則。如可先做細節題再做推斷題，因為細節題大多能直接從文中找到答案，而推斷題則需對短文進行深層理解，再作判斷。
(一)主旨題
主旨題主要考查學生對短文中心思想或作者意圖的掌握。做此類題時，應通讀全文，理解文章大意，充分理解主題句的意義。短文往往圍繞主題句展開，主題句通常出現在短文第一句或最後一句。
(二)細節題
細節題是用來進一步表達主題，體現中心思想的，往往針對短文某個細節來設題。做此類題時，應快速捕捉信息，可能是一些事例、數字等，閱讀時要有針對性。
(三)推斷題
推斷題就是根據某個事實推斷結論，主要考查學生的理解力和推斷力。這類推斷通常包括：數據事實推斷、常識推斷以及作者的寫作目的、態度和傾向等的推斷。做此類題時，應根據短文中的.相關語句，對與事實有關的細節加以分析，找出線索，悟出字里行間的意思，反復比較，從而作出合乎邏輯的判斷。
(四)猜測詞義題
猜測詞義題主要考查學生根據上下文正確判斷靈活變化的詞義能力。一般情況下，推斷詞義的題目中所出現的單詞，大多數是學生未曾見過的生詞，學生需要在該詞出現的上下文中去尋找線索。通過閱讀上下文，斷定該詞的真正含義，然後將這個釋義代入文中，檢查是否貼切，仔細比較直到得出該詞的確切的含義。
1.通過因果關系猜詞
通過因果關系猜詞，首先是找出生詞與上下文之間的邏輯關系，然後才能猜詞。有時文章藉助關聯詞(如because，as，since，for，so，thus，as a result，of course，therefore等等)表示前因後果。例如：
You shouldn't have blamed him for that，for it wasn't his fault.通過for引出的句子所表示的原因(那不是他的錯)，可猜出blame的詞義是"責備"。
2.通過同義詞和反義詞的關系猜詞
通過同義詞猜詞，一是要看由and或or連接的同義詞片語，如happy and gay，即使我們不認識gay這個詞，也可以知道它是愉快的意思;二是看在進一步解釋的過程中使用的同義詞，如Man has known something about the planets Venus，Mars，and Jupiter with the help of spaceships.此句中的Venus(金星)、Mars(火星)、Jupiter(木星)均為生詞，但只要知道planets就可猜出這幾個詞都屬於"行星"這一義域。通過反義詞猜詞，一是看錶轉折關系的連詞或副詞，如but，while，however等;二是看與not搭配的或表示否定意義的詞語，如：He is so homely，not at all as handsome as his brother.根據not at all...handsome我們不難推測出homely的意思，即不英俊、不漂亮的意思。
3.通過構詞法猜詞
在閱讀文章時，我們總會遇上一些新詞彙，有時很難根據上下文來推斷其詞意，而它們對文章的理解又有著舉足輕重的作用，此時，如掌握了一些常用的詞根、前綴、後綴等語法知識，這些問題便不難解決了。
4.通過定義或釋義關系來推測詞義
例如：But sometimes，no rain falls for a long，long time. Then there is a dry period，or drought.
從drought所在句子的上文我們得知很久不下雨，於是便有一段乾旱的時期，即drought，由此可見drought意思為"久旱"，"旱災"。而a dry period和drought是同義語。這種同義或釋義關系常由is，or，that is，in other words，be called或破折號等來表示。
5.通過句法功能來推測詞義
例如：Bananas，oranges，pineapples，coconuts and some other kind of fruit grow in warm areas.假如pineapples和coconuts是生詞，我們可以從這兩個詞在句中所處的位置來判斷它們大致的意思。從句中不難看出pineapples，coconuts和bananas，oranges是同類關系，同屬fruit類，因此它們是兩樣水果，准確地說，是菠蘿和椰子。
6.通過描述猜詞
描述即作者為幫助讀者更深更感性地了解某人或某物而對該人或該物作出的外在相貌或內在特徵的描寫。例如：The penguin is a kind of sea bird living in the South Pole. It is fat and walks in a funny way. Although it cannot fly，it can swim in the icy water to catch the fish.從例句的描述中可以得知penguin是一種生活在南極的鳥類。後面更詳盡地描述了該鳥類的生活習性。
(五)正誤判斷題
正誤判斷題主要考查學生對文章的具體事實、信息的理解能力。一般是根據文章的事實或細節，給出一個句子，判斷其正誤。這類題比較直接，難度相對較小。做此類題時，應先看題，後帶著“問題”快速閱讀短文，尋找所需要的信息。
;6. 科技英語閱讀7內容太長了 到8里接著看吧
【1節】有兩個主要的事情，使飛機工程困難;必須盡一切組成部分可靠的，可能和需要建立的一切輕如可能。事實上，飛機是在空中，不能停止，如果任何事情都會發生錯誤，這使得或許是生死存亡，其性能絕對可靠。鑒於某些權力的發動機，因此，一定燃料消耗，有一個實際的限制，總重量的飛機可以飛。在體重盡可能通緝燃料，無線電導航儀器，乘客座位，或貨物的房間，當然，乘客或貨物本身。因此，結構的飛機將作為體積小，重量輕的安全性和效率將允許。設計者必須計算出的正常負荷，每個部分將難以承受。這個專家稱為''強調人' 。他考慮到任何不尋常的強調，可能是把一部分作為一個防範錯誤的製造，意外損壞等。男子應力的計算去設計的一部分，他必須一樣強烈的應力男子說，如果必要的。一個或兩個樣品的測試總是證明他們是強烈的設計意圖。每個單獨的部分進行測試，然後整個裝配，例如，一個完整的機翼，並最終整個飛機。當一種新型的飛機正在取得，通常只有一個頭三個提出將飛行。兩名將被摧毀在地面上的結構試驗。第三是將測試空氣中。【2節】兩種地面強度試驗進行。首先是尋找抗負荷的翅膀，尾巴等直至他們達到其最大負荷和崩潰。其他測試是疲勞強度。相對較小的載荷應用數千次。每個可以及在什麼樣的結構可以作為一個單一的負荷，但許多重復可能導致崩潰。一位從這個試驗是這樣做的客艙。這是充滿空氣在高壓力，高超低空飛行，完全淹沒在一個大罐的水，而測試正在進行中。周圍的水無法從機艙爆裂像一個炸彈，如果有一個失敗。當飛機已通過所有的測試可以得到政府的單機適航證，沒有這一點，是非法的飛行，除了飛行試驗。製作可靠的工作部件是困難的，因為決策的結構足夠強大。飛行控制，電氣設備，防火措施等。不僅必須重量輕，而且必須在高海拔地方的溫度可能低於冰點和熱空氣的一個機場在熱帶地區。【翻譯的還不錯吧！】
7. 科技英語閱讀 李健版 翻譯U3 植物的適應性 課文翻譯
根據生物某些特徵的存在來確定其它因素的現象，叫生物的指示現象，或指示作用。它們具有指示意義的某些特徵，稱為指示特徵(包括形態的、生理的、生物化學的等)。有氣候指示特徵的(如熱帶植物、寒帶植物)；有水指示現象的(人們在乾旱地區常藉助植物來找水源)；有土壤指示現象的(鐵芒箕是強酸性土壤的指示植物，鹼蓬指示鹼性土壤)；有地質指示現象的(湖北省黃石市就有一種草能指示地下有銅和鐵礦)；還有些植物對環境污染有指示作用，如矮牽牛花。 生物的指示作用表明，各個自然地理要素之間處於緊密相互聯系、相互依賴的關系之中。掌握了它們之間有規律的聯系，就有可能利用一個要素的特徵去認識另一個要素的存在。 從理論上講，地球上最初產生地殼，之後形成大氣圈、水圈，最後出現植被、土壤和動物界。因而，愈是年老的(即先產生的)要素對其它年青的(即後產生的)要素影響愈大；愈是年青的的要素對其它年老的要素依賴性愈大。正是這些獨立性最小而依賴性最大的要素具有最大指示意義。所以，後出現的植物對其它要素的影響具有很大的表現能力。 地球上的生命界可以劃分成不同的層次或組織水平。從大分子有機物開始直到生物圈，復雜程度逐級增加。當從一個層次過渡到另一個較高層次時，生命組織便會出現前一級所不具有的新性質和特徵。 生物存在於地理環境之中的，它們在個體發育的全部過程中，經常不斷地與環境間進行著物質與能量的交換。它從環境中取得必需的能源和營養物質，建造自己的軀體，同時又把不需要的代謝產物排放到外界環境中，以此維持其正常的生命活動和種族的繁續。因此，任何生物有機體都不能脫離環境而生存。環境控制和塑造著生物的生理過程、形態構造和地理分布。 在環境對生物發生影響的同時，生物有機體，特別是它們的群體也對環境產生相當明顯的改造作用。針葉林下土壤的酸度往往比同一地區闊葉林下的要高些。湖泊中浮游生物大量繁殖時，導致水體透明度下降，從而改變水中的光照條件。從更長遠的時間尺度看，生物還參與岩石的風化，地形的改變和土壤的形成，以及某些岩石和礦床的建造。水土流失可以用植物來防治，流動的沙丘可以用喬木、灌木和草本植物來固定。 在環境中對生物的生命活動起直接作用的那些環境要素叫做生態因素，如日光、熱、水、風、礦物鹽類和其他生物等。地形、海拔高度等則屬於間接起作用的因素，它們通過改變氣候、土壤等條件而對生物產生影響。 各個生態因素並不是孤立地、單獨地對生物發生作用，而是共同綜合在一起對生物產生影響，一個生態因素不管它對生物的生存有多麼重要，也只能在有其他因素的適當配合下才能發揮其作用。 生物或其群體具體居住地段的所有生態因素的總體叫做生境。由於地表各地氣候、土壤、岩性和地形等條件不同，形成極其多種多樣的生境類型，這正是地球上生物種類和其群體類型復雜多變的主要原因之一。 地球上各種生態因素的變動幅度非常廣闊，每種生物所能適應的范圍卻有一定的限度。如果當一個或幾個生態因素的量或質低於或高於生物所能忍受的臨界限時，不管其他因素是否適合，生物的生長發育和繁殖都會受到影響，甚至引起死亡。這樣的生態因素稱作限制因素，它是最易阻撓和限制生物生存的因素。限制因素隨時間地點而變，也因生物種類而異。在乾旱和半乾旱地區，水分條件往往是植物生存的限制因素。在嚴重污染的水域中，有毒的污染物常常是水生生物生存的限制因素。在研究環境對生物的生態作用時，既要注意生態因素的綜合作用，又要找出在一定條件下影響生物生存的限制因素，為採取相應管理措施提供科學依據。 生物在其生存過程中，對生態因素的忍耐不僅有一個生態上限和下限，同時在它的耐性限度內還有一個比較小的生態上的最適范圍，在這里生物生長發育得最好。在自然界，生物種並非經常處於其最適生境條件下，因為生物間的相互作用和外界自然條件的變化，妨礙生物去利用最適宜的環境。不同的生物種對生態因素和環境的適應能力有差異。一般來說，對環境適應能力較強種類，其分布范圍較廣。
8. 八年級英語閱讀理解及答案
八年級英語閱讀理解及答案
英語的'閱讀內容涉及的范圍較廣，有關於歷史的也有關現實生活的，有故事性的文章，也有經濟、科技、軍事等方面的文章。下面是我分享的八年級(初二)的英語閱讀理解題，希望能幫到大家!
初二英語閱讀理解【1】
The best way of learning a language is using it. The best way of learning English is talking in English as much as possible. Sometimes you’ll get your words mixed up(混合) and people won’t understand you. Sometimes people will say things too quickly and you couldn’t understand them. But if you sense of humor (幽默感), you can always have a good laugh at the mistakes. It’s better for people to laugh at your mistakes than to be angry with you, because they don’t understand what you are saying. The most important thing for learning English is :” Don’t be afraid of making mistakes because everyone makes mistakes.”
( )1. The writer thinks that the best way for you to learn a language is _____
A. writing it B. using it C. listening D. learning grammar
( )2. What should you do in learning English?
A. Be careful not to make any mistakes B. Write as quickly as you can
C. Speak English as much as you can D. Laugh more often
( )3. When people laugh at your mistakes, you should _____
A. not care B. be happy C. feel worried D. be unhappy
( )4. When you make s mistake, you should ______
A. keep quiet B. get angry C. be kind D. keep your sense of humor
( )5. The story tells us :“______”.
Only foolish(愚蠢) people make mistakes
Few people make mistakes C.People never make mistakes
D.There is no one who doesn’t make mistakes
答案： B.C.A.D.D
初二英語閱讀理解【2】
Look at the light and beautiful snowflakes(雪花)falling.Ever wanted to hold them in your hands?They are always lost when they meet your hands.
Well,this isn’t just a problem for you.It was a problem for Wilson Bentley,too.In the 1870s,Wilson Bentley was just a teenager.His family lived in a small town in northeast America.Winters there were long and hard.Bentley’s mother was once a school teacher. She taught him at home. Bentley didn’t go to school until he was
14. He was a quiet boy, and loved reading his mother’s books.But it was his mother’s microscope (顯微鏡) that interested him. When the other boys were playing with balls, little Bentley was studying things like drops of water, flowers and snowflakes. Bentley loved watching snowflakes. For the next two years young Bentley spent many winter days in a cold room watching these ice crystals (晶體) under his microscope.The boy thought they were so beautiful that he started to draw pictures of them. But there were so many snowflakes that he couldn’t draw them all. How could he keep their beauty forever? Bentley thought of buying a camera.
The boy and his mother asked his father to buy one. But, his father didn’t agree. He thought the whole thing was a bad idea. He thought the only thing a farmer should do was farming.
But finally Bentley did get a camera. For more than a year he tried to take pictures of snowflakes. On January 15, 1885, ring a snowstorm, Bentley took the first ever photo of an ice crystal with his camera. “It was the greatest moment of my life,” Bentley said later.
For 13 years, Bentley worked quietly and took thousands of photos of ice crystals. Later he became known as “Snowflake” Bentley.
根據短文，選擇最佳答案：
( )1. The best title for this passage is ____.
A. Snowflake Photos B. Snowflake Boy
C. Long and Hard Winters D. Teenage Photographer
( )2. We can tell from the story that Bentley’s father was ____.
A. a farmer B. a funny man C. an athletic man D. a school teacher
( )3. Which of the following statements about Bentley is true?
A. He didn’t get any kind of ecation as a child.
B. He was born into a rich family.
C. He was the first person to take photos of snowflakes.
D. He was fascinated by the beauty of snowflakes.
( )4. What kind of person do you think Bentley was?
A. He was outgoing. B. He was too serious.
C. He was interested in learning. D. He was very warm-hearted.
( )5. The “ice crystals” in the third paragraph refers to “____”.
A. water drops B. rain drops C. flowers D. snowflakes
答案 ：B A C C D
初二英語閱讀理解【3】
The sun is always shining. But it can only shine on one side of the earth at one time. When the sun is shining on one side of the earth, it is night on the other side.
At night, you can see the stars(星星). The stars are in the sky all day. But the light from the sun is so bright that you can’t see them. When night come, there is no light, and the stars are bright enough to see. The stars look very small. But some of them are even bigger than the sun. They look small because they are so far away from you. Big things look much smaller when they are far away. The sun is closer(近)to the earth than other stars, so it looks bigger.
( )1.When it is night, the sun ________ .
A. doesn’t shine B. shines for a short time
C. disappears(消失) D. shines on the other side of the earth
( )2.We can’t see the stars in the sky at daytime(白天)because ________ .
A. there are no stars there
B. the stars are much smaller than the sun
C. the bright light from the sun makes them not seen(被看見)
D. the stars come out only at night
( )3.The stars look small because ________ .
A. they are far away B. they are small
C. they have no light D. they are in the sky
( )4.Small things may look ________ when they are close.
A. bigger B. small C. near D. far away
( )5.The sun looks bigger than other stars because ________ .
A. it’s bigger B. it’s far away in the sky
C. it gives much bright light D. it’s closer to the earth than other stars
答案： D.C.A.A.D
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