题目
题型：不详难度：来源：
Since water is so important to us, it is very important that the water we use should be clean , Otherwise, we might get some of the diseases that are carried by water Many microbes are harmful ,They are so small that we cannot see them ,These microbes must be removed or killed before the water is not clean, people who drink this water may get these diseases, Thus , to provide people with clean water, the government purifies the water.
Purification is a long process and consists of three stages: storing ,purifying and distributing ,The first stage is storing , Man-made lakes called reservoirs are used for this purpose ,Water from the rains ,other lakes, streams and rivers is collected in the reservoirs ,This water is usually dirty and muddy.
In the second stage shich is purifying , water from the reservoirs is filtered in a special pond, Stones, sand and other unwanted tiny things are caught in it, After that, tiny microbes are still present in the water ,These microbes are removed by “airing ”the water and by adding a chemical substance called chloring(氯)to the water ,This kills all the microbes in the water ,A fter this the water can be safely used for drinking.
The third stage is the distribution of the purified water to homes ,hospitals, offices ,factories and other places, This is done through a network of pipes of various sizes, These pipes must be make of a suitable material.
小题1:From Paragraph 1, we can learn that
| A．Rain has contained gases when it forms in the clouds |
| B．Dust and microbes are dissolved in rain when rain falls on the ground |
| C．The closer rain is to the ground, the more impure things it contains |
| D．Sand and mud are things rain collects when it falls through the air |
| A．All the microbes in water are harmful so water must be purified |
| B．some diseases can spread through drinking water if it is not clean |
| C．Water is safe to drink if only harmful microbes are removed from it |
| D．it is the govrnment’s responsibility to make drinking water clean |
| A．It is used through the whole process of purification |
| B．Only rain water can be collected and stored in it |
| C．Water collected can be stored and filtered in it |
| D．Water from them contains a lot of impure substances |
| A．to air the water | B．to catch tiny things |
| C．to kill microbes | D．to remove harmful gases |
| A．A news report | B．A book review | C．A magazine article | D．A school paper |
答案
小题1:C
小题2:B
小题3:D
小题4:C
小题5:C
解析
试题分析：本文主要讲述了净化水的过程以及在净化的过程中人们采用的多种不同的净化方法。
小题1:C 推理题。根据文章第一段as it falls through the air it dissolves some of the gases in the air ,It also collects bits of dust and microbes(微生物)that are floating in the air, When the rain reaches the ground it begins to pick up more dust and dirt, Many kinds of mineral substances dissolve in the water ,Sand and nud cannot dissolve in water.可知在下落的过程中，雨水溶解了很多有害的物质在里面，所以雨水越靠近地面，越脏。故C正确。
小题2:B 细节题。根据文章第二段3,4行,These microbes must be removed or killed before the water is not clean, people who drink this water may get these diseases可知这样的水里含有很多有害的物质，喝了会让我们生病，影响我们的健康。故B正确。
小题3:D 细节题。根据文章第三段最后2行Man-made lakes called reservoirs are used for this purpose ,Water from the rains ,other lakes, streams and rivers is collected in the reservoirs ,This water is usually dirty and muddy.可知在这样的人工湖里的水是很脏的。故D正确。
小题4:.C 推理题。根据文章倒数第二段,These microbes are removed by “airing ”the water and by adding a chemical substance called chloring(氯)to the water ,This kills all the microbes in the water ,A fter this the water can be safely used for drinking.可知加入氯是为了***死水里的病菌。故C正确。
小题5:C 推理题。本文主要讲述的是净化水的过程，属于科普类的文章，最可能出现在科普类短文杂志里。故C正确。
核心考点
试题【As rain begins to fall from the clouds, it is very pure. However, as it falls th】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
The researchers looked at data from ,11,499 children who took part in a large study, It showed that 507 who were slow to gain weight in the first eight weeks of life recovered fairly quickly and had almost caught up by age 2. Another group of 480 who were slow to gain between eight weeks and nine months continued to put on weight slowly until they were seven years ,but then had a sudden increase and caught up by age 13, The different pattems of recovery between the two groups were likely due to different reasons for slow weight gain ,the researchers said, All the children were still lighter and shorter than their peers by the time they were teenagers ,but within the normal range.
The findings highlight the importance of monitoring a baby’s weight and height gain during the first few weeks and months ,but not creating anxiety with parents of slow-growing babies, said the study leader Prof Alan Emond from the University of Bristol.
“In the past, a lot of parents have been caused unnecessary anxiety by heaith professionals and this is a positive and reassuring message.”He said in many cases of slow growth where children do not follow the standard’curve’(曲线)it is just because they are following their genetic potential.
Dr Simon Newell, vice-president of the Royal College of Paediatrics and Child Health, said he broadly agreed with the concluslons of the researchers but stressed that poor weight gain was something that needed to be monitored closely, “I would encourage parents to use growth charts but if measurements show your baby is smaller than averager it may be completely normal, ”he said.
小题1:What can we know from the findings of the research?
| A．All the cases of slow weight gain in the first months of the babies’ lives are caused by the same reason |
| B．Slow-growing babies will have the same height and weight with their peers by age13 |
| C．Many cases of children whose growth don’t meet the growing standard curve cannot be treated as abnormal |
| D．The findings won’t cause parents’ anxiety so monitoring a baby’s growth from his/her birth is unnecessary |
| A．It’s important to monitor a baby’s weight and height gain for new parents |
| B．New parents should feel anxious about their baby’s weight and height gain |
| C．Researches still couldn’t find the reasons for slow weight gain |
| D．All the children’s weight and height became normal by age 13 |
| A．Making sure something is certain to be true |
| B．Making someone calmer and less anxious |
| C．Confirming something is to happen again |
| D．Being sure that someone can be attracted |
| A．To some degree, growth charts can help parents monitor their babies’ weight gain |
| B．It’s abnormal for babies are smaller than average |
| C．He agreed with the researchers completely |
| D．Babies’ weight gain can only be monitored and measured by using growth charts. |
| A．tell us how to help babies grow faster |
| B．explain why babies are gain weight slowly |
| C．report on the findings of a research |
| D．reduce the anxiety of some parents |
Hydrogen is one of the building blocks of the universe ,Our own sun is basically ,a big ,dense cloud of the stuff ,And hydrogen can be used to create electricity for power ,heat and light.
The problem is that hydrogen is everywhere and nowhere at the same time , It does not exist as a material on its own ,but is always part of something else, So it has to be separated before it can be used.
Most commercial hydrogen in use now is created from natural gas , As oil will start to run out in around the year 2030.,it makes sense to produce as much hydrogen as possible as soon as we can ,But natural gas supplies will also begin to run out soon after, Another source is needed.
Researchers are now using electricity to make water into hydrogen ,Companies are working on the problem in their own areas ,The first commercial hydrogen ,”fuel cells”for computers and mobile phones have already come on to the market ,Auto companies have also invested over US ＄2billion in the production of hydrogen fuelled cars
Thd nations of a hydrogen fuelled planet would not fight over evergy recourses, There would be a great reduction in pollution ,The only by-product of creating hydrogen is pure drinking water—something that is very scarce in many parts of the world ,But that is not where the good news ends, Once the costs of producing hydrogen have been brought down ,it will possibly provide power for a third of the Earth ‘s population that has no electricity.
And electricity creates wealth, In South A frica over the last decade there has been a large programme of electrification, Thanks to the programme , people do not have to spend their days looking firewood to burn for heat, And with electric light , they can work long into the night.
Some scientists see radical changes in the way the human race co-operates, Hydrogen creates clectricity, and is also created by it. With dual use fuel cells, everyone who consumes energy could also produce it ,Late at night, a man drives home in London and connects his car into the “world-wide hydrogen web”, which it supplies with electricity ,A few hours later, a man in Beijing uses that electricity to power the hydrogen cell in his car, Hydrogen could be the first democratic energy source.
Like all dreams of the future, it seems very far away, But the threat of war and terrorism in the Middle East has made governments and businesses more aware of the need to edn oil dependency and spend more time and money on hydrogen resource, So maybe the threat of war is not a completely bad thing for the future of the human race.
小题1:What does the underlined word “it”in the last but one paragraph refer to?
| A．wealth | B．hydrogen | C．electricity | D．fuel |
| A．It has by-products |
| B．It has to be separated from other materials |
| C．It will make energy too cheap |
| D．It is too far away from us |
| A．To tell us that we produce energy while using hydrogen power |
| B．To tell us that hydrogen power does not produce pollution |
| C．To show hydrogen power can stop war |
| D．To show hydrogen power is cheap |
| A．skeptical | B．negative | C．indifferent | D．positive |
| A．war and energy |
| B．the future of hydrogen as an energy resource |
| C．the disadvantages of oil |
| D．How to end war |
Professor Taiju Matsuzawa wanted to find out why quite healthy in northern Japan appeared to be losing their ability to think and reason at a rather early age, and how the speed of getting old could be slowed down.
With a team of researchers at Tokyo National University, he set about measuring brain volumes of a thousand people of different ages with different jobs. Computer technology helped the researchers to get most exact measurements of the volume of the front and side parts of the brain, which have something to do with intellect and feelings, and decide the human character. As we all know, the back part of the brain, which controls task like eating and breathing, does not contract with age.
Contraction of front and side parts—as cells die off—was seen in some people in their thirties, but it was still not found in some sixty and seventy-year-olds.
Matsuzawa concluded from his tests that there is a simple way to prevent the contraction—using the head.
The findings show that contraction of the brain begins sooner in people in the country than in the towns. “Those with least possibility,” says Matsuzawa, “are lawyers, followed by university professors and doctors. White collar workers doing the same work day after day in government offices are, however, as possible to have contracting brains as the farm worker, bus driver and shop assistant.”
小题1:The team of doctors wanted to find out _____.
| A．at what point people grow mentally old |
| B．how to make people live longer |
| C．the size of certain people’s brains |
| D．which people are the most clever |
| A．an examination of farmers in northern Japan |
| B．tests given on a thousand old people |
| C．examining the brain volumes of different people |
| D．using computer technology |
| A．our brains contract as we grow older |
| B．one part of the brain does not contract |
| C．sixty-year-olds have better brains than thirty-year-olds |
| D．some people’s brains have contracted earlier than other people’s |
| A．most of us take more exercise |
| B．it’s better to live in the town |
| C．the brain contracts if it is not used |
| D．the more one uses his brain, the sooner he becomes old |
“The LF1300 is the world’s first mobile phone that is capable of reading books for the print-disabled, who otherwise could not enjoy them. This is not about making money but about continuing to put froth efforts to reduce the digital difference for the disabled,” LG Vice President said.
Its users can download about 300 audio (声音的) books from the Internet site of LG Sangam Library to their phones for free in two ways. One is to access the digital library’s Website on a computer designed for the blind to get the audio books and transfer them to cell phones. The other is to download the digital books directly with cell phones through the wireless net work by touching a hot key on the LF1300 phone.
On top of its unique feature of reading books, the LF1300 is no worse than the popular top-line phones in both outlooks and functionalities(功能性). The phone is armed with an MP3 player and a Bluetooth headset, enabling users to listen to the music or talk without a cord. The user interface（界面) of the LF1300 is also designed for the blind, enabling phone users to control it through a voice guidance system.
However, because the phone’s internal memory of 17MB is small even for a single audio book file, which takes up 80MB on average, a high-volume external memory is a must for the talking book services.
小题1: are allowed to buy the talking phone.
| A．Disabled people with a certificate |
| B．All the blind and poor-sighted people |
| C．The blind and poor-sighted with a certificate |
| D．Both healthy and disabled citizens |
| A．talking to the microphone |
| B．touching any key |
| C．touching its screen |
| D．touching the hot key |
| A．This is the first time LG Company has done something for the disabled. |
| B．Phone users don’t have to pay much to download the digital books. |
| C．LF1300 has a less attractive outlook than any other top-line phone. |
| D．The disadvantage of LF1300 is that it has too small internal memory. |
| A．A New Type of Cell Phone is on the Market |
| B．Mobile Phones Can Read Books for the Print-Disabled |
| C．The Disabled will Benefit from Cell Phone Producers |
| D．Advanced Technology Helps the Blind Read Books |
Their evidence for recent volcanic activity on Venus comes from a lava(熔岩) flow in the planet’s northern hemisphere. The flow is hotter than the rocks around, which means the lava might still be cooling off. “The flow we studied seems to be very young---it is still warm inside,” Nataliya Bondarenko said.
Venus is a difficult planet to study from Earth because it is surrounded by thick clouds. Telescopes on Earth can’t see through these clouds, so the best information about Venus comes from spacecraft orbiting it.
Bondarenko and her colleagues studied the lava flow using data from NASA’s Magellan mission. That spacecraft spent four years in orbit around Venus and used radar to make a map of 98 percent of the planet’s surface. On October 11th, 1994, the mission ended, and the spacecraft plunged (跌落) through Venus’ heavy cloud cover and crashed onto the planet below.
While in orbit, the Magellan craft sent microwaves, which can go through Venus’ clouds, to the surface. Microwaves are invisible and can be as long as three feet. These waves are a kind of energy, like light. And like light, they bounce off surfaces. The way the waves bounced off the Venus’ surface and back to the craft supplied information that the scientists used to estimate the temperature of various parts of the planet’s surface. Bondarenko’s team found that the lava flow was hotter than its surroundings---which may mean the lava flow is in the process of cooling.
The scientists say the lava flow can’t be very old because if it were, it would have cooled off enough that Magellan wouldn’t have noticed the difference in microwaves. She adds that the flow appears in a 1978 view of the surface that a craft called the Pioneer Venus Orbiter captured.
小题1:What happened to Magellan in the end?
| A．It was floating in space forever. |
| B．It flew into heavy clouds. |
| C．It returned to the Earth. |
| D．It fell onto Venus. |
| A．By looking at it with a powerful telescope. |
| B．By measuring the thickness of clouds over Venus. |
| C．By calculating the microwave bouncing off Venus’s surface. |
| D．By orbiting Venus for 4 years in a spacecraft. |
| A．Warm lava on Venus |
| B．More volcanic eruptions on Venus |
| C．Venus is just like a big active volcano |
| D．Lava flows are first found on Venus |
最新试题
- 1如图所示，点是△的边上的中点，则向量 ( )A．B．C．D．
- 2（20分）阅读下列材料．结合所学知识回答问题。材料一：电脑、互联网的高速发展，极大地改变了人们学习、生产、生活与娱乐的方
- 3现在请听一段对话，完成第1至第2小题。1. Who will go with the girl?A.Her father
- 4化简a2a•3a2=（ ）A．6aB．16a5C．5a6D．6a5
- 5牵牛花清晨开放，傍晚关闭．这种生命现象说明生物具有的特征是（ ）A．生长发育B．呼吸C．需要营养D．适应一定的环境
- 6用显微镜观察细胞，能在视野中看到细胞数目最少的镜头组合是 A．15×， 10×B．15×，25×C．10×，10
- 7—How old is your daughter? —_____. We had a special party fo
- 8There __________ a pen and two pencils in the bag. [ ]A.
- 9The little boy has a strange idea that if he _____ born in A
- 10数列1，12，12，13，13，13，14，14，14，14，…的前100项的和等于（ ）A．13914B．13111
热门考点
- 1指出“鸦片流毒于天下，则为害甚巨，法当从严”的_______________，他于1839年6月3日下令将收缴的鸦片在_
- 2人类上天揽月的梦想自古就有，我国月球探测工程标志以中国书法的笔触，抽象地勾勒出一轮圆月，一双脚印踏在其上，象征着月球探索
- 3下列反应既属于氧化还原反应，又是放热反应的是 A．酒精燃烧生成CO2和H2O
- 4读“我国南、北方水资源、人口及耕地分布对照图(%)”,回答下列小题:小题1:下列有关图中内容的说法,正确的是A．我国人口
- 52009年12月20日是澳门回归十周年纪念日，也是《中华人民共和国澳门特别行政区基本法》实施10周年。10年来，一个社会
- 6实验室用下图所示装置测定空气中氧气的含量，下列说法错误的是A．实验开始时加热是使红磷的温度达到着火点B．集气瓶中燃烧的红
- 7利用如图一所示的分压电路研究电阻的U-I关系．电源内阻不计，R0为定值电阻．滑动变阻器总电阻100Ω，将其电阻部分4等分
- 8如图，AB是⊙O的直径，∠AOC=1100， 则∠D=【 】A． 250B．350C． 550D．700
- 9材料一 17—18世纪，中国古代的主要经典和儒家学说，通过传教士的介绍、研究，在欧洲知识界和上层社会得到了流传和宣扬，
- 10设函数的定义域为，则函数和函数的图象关于（ ）A．直线对称B．直线对称C．直线对称D．直线对称