A microscope is a useful instrument for observing small objects. By producing a
题型：不详难度：来源：
A microscope is a useful instrument for observing small objects. By producing a bigger image, the microscope reveals details that are undetectable to the naked eye(裸眼).
Before using the microscope, please read the instructions below.
CAUTION: Microscopes are both delicate and expensive and must be handled with care.
1. Always carry the microscope with two hands — one supporting the base and the other on the arm.
2. Avoid stretching the wire of the lamp across a walkway.
3. Keep the stage clean and always use a glass slide for specimens(样本).
4. To avoid crushing the glass slide when focusing, begin with the lens close to the specimen and gradually back off to focus.
5. Keep the microscope covered to prevent the dust while it is being stored.
HOW TO USE THE MICROSCOPE:
1. Plug(接通电源) in the lamp.
2. Place a sample of what you wish to observe on a slide.
3. Adjust the mirror so it reflects light from the room up into the objective lens. When the mirror is correctly adjusted, a complete circle of light iwll appear when you look through the eyepiece.
4. Place your slide with the specimen directly over the center of the glass circle on teh stage. If it is a wet slide, be sure the bottom of the slide is dry.
5. With the LOW POWER objective leans placed over the slide, use the coarse focus knob to lower the lens to the lowest point.
6. Look through the eyepiece with one eye while closing the other eye. Slowly raise the lens until teh focus is relatively clear.
7. Use the fine focus knob to fine -tune(微调)the focus.
8. Without changing the focus knobs, switch to the HIGH POWER objective lens. Once you have switched to HIGH POWER, use only the fine focus knob to make the image sharper.
小题1:Which of the following is the correct way to use a microscope according to the text?
| A．Use one hand to carry the microscope |
| B．Place a sample directly on the clean stage |
| C．When stored, the microscope should be adjusted. |
| D．Look through the eyepiece with one eye. |
| A．Switch to objective lens. | B．Adjust the mirror. |
| C．Look through the eyepiece. | D．Place the hair on a glass slide. |
| A．after correctly adjusting the mirror |
| B．while looking at the specimen on a glass slide |
| C．after slowly raising the objective lens |
| D．before positioning the mirror correctly |
答案
小题1:D
小题2:D
小题3:A
解析
试题分析：本文主要介绍了显微镜的使用注意事项以及具体如何使用的方法。
小题1:D 细节题。根据第6点Look through the eyepiece with one eye while closing the other eye. Slowly raise the lens until teh focus is relatively clear.说明要用单眼来观察，故D正确。
小题2:D 细节题。根据第2点Place a sample of what you wish to observe on a slide说明D正确。
小题3:A 细节题。根据第3点Adjust the mirror so it reflects light from the room up into the objective lens. When the mirror is correctly adjusted, a complete circle of light iwll appear when you look through the eyepiece.说明调整镜子以后就可以看见了一个完整的圆圈了，故A正确。
点评：本文主要介绍了显微镜的使用注意事项以及具体如何使用的方法。本文属于科普类短文，此类文章的最大的障碍是词汇以及考生对阅读内容的不熟悉，需要考生在阅读的时候有足够的耐心。要养成在上下文串联中猜测词义的能力，根据上下文中出现的同义词，近义词，反义词，以及词义的解释来理解生词。同时要抓住文章的中心，不要受其他信息的影响。要根据题目及选项以及文章的上下文串联合理的判断推理。
举一反三
Using a tiny microchip which is implanted into the arm, they have come up with a replacement for cash or credit cards that cannot be left at home or dropped on the bus.
The Verichip is about the size of a grain of rice and works using radio frequency identification technology. At a shop, a radio frequency “reader” would send a signal and the chip in your arm would respond with your unique identity number. That would give the “reader” your financial information, and money could be taken directly from your accounts and you wouldn"t even have to reach for your wallet.
The company also hopes to include other information on the chip, such as medical records, building security codes(密码) and passwords, making life even easier.
But not everyone is happy with the developments. Critics say that a lot can go wrong with the chip. A clever thief could build a fake(假的) reader that would steal your information without you knowing. So your money could still be stolen. Privacy is a big issue too. Stores, or even the government, only need to track the chip to find out what you buy, how much you spend and where you go.
And if you wanted to get rid of your chip,you would need an operation to remove it.
小题1:The Verichip is .
| A．the identity number | B．the security code |
| C．a tiny microchip | D．a radio reader |
| A．how the Verichip works |
| B．the importance of the Verichip |
| C．the development of the Verichip |
| D．how money is taken from your accounts |
| A．Your information on it will always be safe. |
| B．Medical records have already been included. |
| C．You can easily reach for your wallet using it. |
| D．An operation has to be performed to remove it. |
| A．All people are satisfied with the chip. |
| B．The Verichip company has financial problems. |
| C．The chip needs improving to be widely accepted. |
| D．Many people have the experience of losing keys or money. |
| A．warn | B．advertise | C．compare | D．introduce |
Whenever anyone measures educational success, East Asian countries are always top scorers. But in a recent league table, a European country, Finland, was top of the class. South Korea was still in second place, though. Britain was at number 6.
In Korea the school day is long—typically 7 or 8 hours, followed by hours of private tutoring in the evenings. All this hothousing leaves Korean students so tired, they sometimes fall asleep in class next day. Worries about the effects of late night cramming(填鸭式) led the government to force cramming schools to close by 10 pm. Finnish children spend the least time in class in the developed world, often finishing just after lunch, with about one hour of homework a day. Private tuition is uncommon. The British and American school day is quite long in comparison, around 6 hours, and secondary school pupils do 2 or 3 hours of self-study a night.
The Korean education system, like many in Asia, is intensely competitive, with students even competing to get into the best cramming schools, to help them get ahead. Finnish education is far less cut-throat. Classes are all mixed ability, and there are no league tables. British schools again occupy the middle ground, with quite high levels of competition for places at university, and schools and universities battling to come top of league tables for everything from exam results to student satisfaction. Korea and Finland both do well, yet their education systems are so different.
However, there are some similarities in Korea and Finland. In those countries, teachers have high status in society, and education is very highly valued. Those attitudes can"t change quickly. But it can be done. They might be the star pupils now, but until the l970s, Finland"s educational system was poor. Their thoroughly different approach to schooling has taken them to the top in just a generation.
小题1:The students spend the least time in school in .
| A．the UK | B．Finland | C．the USA | D．Korea |
| A．students spend more time in studying |
| B．students are tired of studying in class |
| C．students leave their school early |
| D．students are always top scorers |
| A．private evening tutoring | B．self-study at home |
| C．long-hour study | D．school study |
| A．Finnish students are less stressed in study |
| B．there"re also many cramming schools in Britain |
| C．students in Korea are the most competitive in Asia |
| D．British schools are less competitive than universities |
| A．the attitude | B．the schooling time |
| C．star pupils | D．new teaching approach |
Since the 1960s, the United States and a handful of other countries have trained dolphins and sea lions to detect sea mines and swimmers, to recover inert torpedoes（鱼雷）and to test objects used in Naval exercises.
Program officials estimate that the sea lions in the Marine Mammal Program have recovered millions of dollars of U.S. Naval torpedoes and instrumentation dropped on the sea floor.
The U.S. Navy kept its Marine Mammal Program a secret until the 1990s, and this spring CNN became one of only a handful of media outlets to see firsthand how the program works.
The program has trained about 75 Pacific bottlenose dolphins, with natural biosonar (生物声纳) that tracks better than any manmade device; and 35 California sea lions, with superb underwater eyesight.
Not only do these trained marine mammals track and retrieve millions of dollars in U. S. military equipment, they are also helping to save lives.
The Navy won"t disclose whether the dolphins and sea lions have effectively intercepted （阻拦）terrorists attempting to do harm to any U.S. facilities.
"Either way, it serves as a deterrent（阻碍） effect." says Christian Harris, operations supervisor for the program. The mammals can be deployed（调动） via C-130 cargo aircraft to perform their missions anywhere in the world within 72 hours. They have been used in exercises from Alaska to Hawaii, operating in great temperature and environmental ranges. They also have the capability to operate off vessels.
Dolphins most recently were deployed in the Iraq war, performing mine detection and clearance operations in the Persian Gulf to ensure safe passage for humanitarian ships delivering aid. Some of these Iraq war "veterans" are now back home, tasked with a new mission: guarding nuclear submarines in their homeports of Bremerton, Washington, and Groton, Connecticut.
小题1:The underlined word "retrieve" in Paragraph 6 can be replaced by ________.
| A．find out | B．recover | C．save | D．detect |
| A．To detect sea mines and swimmers. |
| B．To save lives of people. |
| C．To recover inert torpedoes. |
| D．To help the U.S. Naval test equipment. |
| A．These trained marine mammals eat pounds of fish a day. |
| B．The U.S. Navy performed the Marine Mammal Program for about 30 years secretly. |
| C．These mammals can carry out a task everywhere. |
| D．A lot of countries will train dolphins and sea lions for anti-terrorism. |
| A．The Special Skills of Marine Mammals | B．The U.S. Anti-terrorism Program |
| C．Exceptional Anti-terrorism Member | D．Trained Marine Mammals |
of its 200 inhabited islands，which are spread across an area of"35，000 square miles，99 are good resorts(旅游胜地)．So many tourists come every year，more than double the local population．Of these，over l 00，000 travel from the U K．The capital，Mal6，is four times more densely populated than London．Given these facts，it’S hardly surprising that the Maldives has a waste disposal problem．
Y ears a90，when the tourists left，the government had to deal with a stream of rubbish．Their solution was to turn one of the islands into a dumping ground．Four miles west of Mal6 is the country’s dumping ground，Thilafushi．What you are seeing here is a view of the Maldives on which no honeymooners will ever clap eyes．Each visitor produces 3．5 kg of waste per day．The country dumps more than 330 tons of rubbish on the island every day．
Now，since many waste boats，fed up with waiting seven hours or more，directly offload their goods into the sea，the government of the Maldives has banned the dumping of waste on the island．S0，the waste boats ship the rubbish to India instead．
小题1:What is the main cause of the waste disposal problem?
| A．The big local population． | B．Too many waste boats． |
| C．The large number of tourists． | D．Open fires on the islands． |
| A．it’s quite similar to | B．it’S a long distance from |
| C．it’s a loud shout from | D．it’S totally different from |
| A．It iS much more crowded in Mal6 than in London． |
| B．Another island will be used as a dumping ground． |
| C．No honeymooners are willing to visit the Maldives． |
| D．Waste on islands will be offloaded directly into the sea． |
| A．To attract more tourists to the Maldives． |
| B．To state the waste disposal problem in the Maldives． |
| C．To call on us to protect the environment． |
| D．To explain the causes of pollution in the Maldives． |
Researchers identified different“personalities” in their fish by observing the boldness or shyness of individuals，according to The Nature．Like people，some fish are very confident in the face of novelty(新奇事物)or conflict；while others are silent and fear．
The scientists selected particularly bold and shy rainbow trout，and tested whether they changed their outlook depending on what life threw at them．They arranged some fish to fight and others to watch to see how both the participants and observers responded to victories and defeats．Winning or losing a fight，or even watching fellow fish overcome the difficulties influenced the future behavior of the creatures studied in the lab．
The researchers made fish compete with much larger or smaller opponents．to ensure that they would win or lose their fights．These bold fish that won their fights tended to be even bolder when later presented with a novel food item；losing their fight caused them to be much more cautious．
Fish also learn by watching others．Bold fish watching a shy fish exploring a mystery object were much more nervous when later given a novelty item for themselves．
Predictably，shy fish that won a fight also gained more confidence，but surprisingly，shy fish that lost their fights also grew bolder when exploring strange new food，Sneddon said，adding that this could be due to what she calls a“desperado effect”(亡命徒效应)．
The new research suggests that animals can gradually adapt their personalities．The results echo the effects that life experience can have on human．
小题1:What does．the underlined word“creatures’’probably refer to?
| A．Fish． | B．Participants． | C．Observers． | D．Researchers． |
| A．a conclusion of the research |
| B．an explanation of fish characters |
| C．a statement of the experiment |
| D．a description of fish fights |
| A．Bold losing fish become—e bolder when presented With a novel food item． |
| B．Losing their fights causes the bold fish to be much more courageous． |
| C．Bold fish watching a shy fish exploring a mystery get less nervous． |
| D．Shy fish losing fights grow more confident in exploring new food． |
| A．Fish have stress in the fierce fights． |
| B．Fish care about winning or losing a fight． |
| C．Fish have adaptable personalities． |
| D．Fish can learn a lot by watching others． |
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