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????????????????????????????????????????????????????????????????????????? Computer Mouse

【*】The basic computer mouse is an amazingly clever invention with a relatively simple design that allows us to point at things on the computer and it is very productive. Think of all the things you can do with a mouse like selecting text for copying and pasting, drawing, and even scrolling on the page with the newer mice with the wheel. Most of us use the computer mouse daily without stopping to think how it works until it gets dirty and we have to learn how to clean it. We learn to point at thing before we learn to speak, so the mouse is a very natural pointing device. Other computer pointing devices include light pens, graphics tablets and touch screen, but the mouse still our workhorse.
【*】The computer mouse was invented in 1964 by Douglas Englehart of Stanford University. As computer screens became popular and arrow keys were used to move around a body of text, it became clear that a pointing device that allowed easier motion through the text and even selection of text would be very useful. The introduction of the mouse, with the Apple Lisa computer in 1983, really started the computer public on the road to relying on the mouse for routine computer tasks.
【*】How does the mouse work? We have to start at the bottom, so think upside down for now. It all starts with mouse ball. As the mouse ball in the bottom of the mouse rolls over the mouse pad, it presses against and turns two shafts. The shafts are connected to wheels with several small holes in them. The wheels have a pair of small electronic light-emitting devices called light emitting diodes (LED)mounted on either side. One LED sends a light beam to the LED on the other side. As the wheels spin and a hole rotates by, the light beam get through to the LED on the other side. But a moment later the light beam is blocked until the next hole is in place. The LED detects a changing pattern of light, converts the pattern into an electronic signal, and sends the signal to the computer through wires in a cable that goes out the mouse body. This cable is the tail that helps give the mouse its name. The computer interprets the signal to tell it where to position the cursor on the computer screen.
【*】So far we have only discussed the basic computer mouse that most of you probably have or have used. One problem with this design is that the mouse gets dirty as the ball rolls over the surface and picks up the dirt. Eventually you have to clean your mouse. The newer optical mice avoid this problem by having no moving parts.
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Most computer users want to know how the computer mouse works.（）

A

?True

B

False

C

Not Given

Among all the computer pointing devices, touch screen is the most expensive one.（）

A

?True

B

False

C

Not Given

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? English and English Community

There is no denying that English is a useful language. The people who speak English today make up the ___1___ speech

community in the world with the exception of speakers of Chinese. Originally they were small tribes of people from northern Europe who ___2___ in England. Their languages became more and more ___3___ to each other. Finally, the language

had enough uniformity to be used by all speakers in England. The people were united into a speech community through

their shared languages.

Speech community is similar to other kinds of ___4___. The people who make up the community share common language. Often they live side by side, as they do in a neighborhood, a village, or a city. More often they form a whole country. National boundaries, however, are not always the same as the boundaries of a speech community. A speech community is any group of people who ___5___ the same language no matter where they happen to live.

We may say that anyone who speaks English ___6___ to the English speech community. For convenience, we may classify the speakers into two groups: one in which the speakers use English as their native language, the other in which the

speakers learn English as a second language for the ___7___ of education, commerce, and so on.

English serves as an alternative language in several areas of public activity for most nations in the world which employ it as an ___8___ second language. English has been adopted as the language of air traffic, commerce, as well as international

diplomacy. Moreover, English is the ___9___ of the majority of published materials in the world so that education has come

to rely ___10___ on an understanding of English.

A. international

B. native

C. speak

D. belongs

E. purpose

F. language

G. communities

H. settled

I. similar

J. same

K. heavily

L. largest

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Online Dating

Online dating is a dating system which allows people to make contact and communicate with Online each other over the

Internet, usually with the object of developing a ___11___ (romance) relationship. Online dating services usually provide

matchmaking over the Internet through the use of personal computers or cell phones

Online dating sites generally requires ___12___(apply) to provide personal information before they can search the

database for other individuals using criteria they set, such as age, gender, race religion and ___13___(locate). Most sites allow members to upload photos of themselves and browse those of others. Sites may offer ___14___ (addition) services,

such as online chatting, telephone chatting, and message boards.

Some sites provide free ___15___ (register), but may offer services which require a___16___ (month) pay. For example,

they may offer full access to profiles, but provide additional services to pay, such as ___17___ (place) users' profiles at the

top of the listing their profiles appear several times in different places in the search result and giving them a more ___18___ (advance) search engine to work with. In one real example, free users may only search for persons of ___19___ (specify)

age, gender and city, while subscribers may also search for such information as height, weight and interests. Other dating

sites depend on advertising for their income. In recent years such sites have become ___10___ (increase) popular.

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? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Electricity

The modern age is an age of electricity, People are so used to electric lights, radio, televisions and telephones that it is hard to imagine what life would be like without them. When there is a power failure, people grope about in flickering candlelight,

cars hesitate in the streets because there are no traffic lights to guide them, and food spoils in silent refrigerators. Yet, people began to understand how electricity works only a little more than two centuries ago. Nature has apparently been

experimenting in this field for millions of years. Scientists are discovering more and more that the living world may hold

many interesting secrets of electricity that could benefit humanity.

All living cells send out tiny pulses of electricity. As the heart beats, it sends out pulses of record; they form an electrocardiogram, which a doctor can study to determine how well the heart is working. The brain, too, sends out brain waves of electricity, which can be recorded in an electron-cephalogram. The electric currents generated by most living cells are extremely small-often so small that sensitive instruments are needed to record them. But in some animals, certain muscle cells have become so specialized as electrical generators that they do not work as muscle cells at all. When large numbers of these cells are

linked together, the effects can be astonishing.

The electric eel is an amazing storage battery. It can send a jolt of as much as eight hundred volts of electricity through the

water in which it lives. An electric house current is only one hundred twenty volts )As many as four fifths of all the cells in the electric eel's body are specialized for generating electricity, and the strength of the shock it can deliver corresponds roughly

to the length of its body.

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What is the main idea of the passage?

A

Electric eels are potentially dangerous

B

Biology and electricity appear to be closely related

C

People would be at a loss without electricity

D

Scientists still have much to discover about electric

The author mentions all of the follow lowing as results of a blackout EXCEPT

A

refrigerated food item may go bad

B

traffic lights do not work

C

people must rely on candlelight

D

elevators and escalators do not function

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Singapore

Singapore is an independent city-state in southeastern Asia, consisting of one major island—the Singapore island—and more than 50 small islands, located off the southern tip of Malay. The city of Singapore, the capital of the country, is at the southeastern end of the Singapore Island; it is one of the most important port cities and commercial centers of Southeast Asia. The total area of the republic is 640 sq km

Low-lying Singapore Island has no outstanding relief(輪廓鮮明的) features. A central area of hills rises to the maximum height of 176 m. The country has a wet tropical climate, with an average annual temperature of 27.20℃. The average annual rainfall is 2.413 mm. the wettest months are November through January.

Singapore is governed under a constitution of 1959. A president, elected to a four-year term, is head of state, and a prime minister is head of government. The president used to be selected by Parliament, but by 1991 constitutional amendment（修正案）, the president is now elected directly by the people. The Parliament is the law-making body with its 81 members popularly elected.

In the late 1980s the country had some 290 primary schools with 278,300 pupils and 160 secondary schools with 200,200 students. The main institutions of higher education are the National University of Singapore, several technical colleges, and a teachers college.

Singapore has one of the highest standards of living of any country in Asia. In the late 1980s the gross domestic product was estimated at $23.7 billion, or $8, 870 per person. The fishing industry is centered on the port of During, on southwestern Singapore Island. Industry has grown rapidly since the 1960s, and Singapore now produces a diversity of goods, including chemicals, electronic items, clothing, and processed foods, etc. Shipbuilding and petroleum refining are also important.

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Paragraph 1（）

A

Education

B

Land and Climate

C

State System

D

?General Introduction

E

Economy

F

Population

Paragraph 2（）

A

??????????????Education

B

?Land and Climate

C

State System

D

?General Introduction

E

Economy

F

Population

Immigration and Problems

Hundreds of thousands of people supporting immigration rights in the US filled streets all over America in early 2006. Many held signs and American flags and asked to be __1__ as citizens rather than criminals. Senator John McCain held the opinion that the country should open a __2__to citizenship to immigrants(移民) who were already in the country illegally, while other politicians__3__ for stricter measures---including rounding up undocumented immigrants and sending them back to their home countries.

Canadian officials say that immigration applications continue to rise. Some want to keep the doors __4__. They need the labor. About 400,000 immigrants were allowed into the country in 2005, according to the Canadian Government statistics. __5__ all this growth means that cities need to adapt. New comers don’t always make a smooth transition into jobs for which they are skilled. So industries are using mentoring(輔導(dǎo))programs to help new __6__ find proper jobs.

With the large numbers of undocumented African immigrants arriving in the Canary Islands, the Spanish Government has decided to get __7__. There will be no more mass amnesties(特赦)for the illegal immigrants, and anyone coming to Spain without __8__ will be sent back.

France's new immigration and integration law gives the government new powers to encourage high-skilled migration. It takes __9__ in 2007. The new law authorizes the government to help these identified employers find immigrant workers with needed skills or qualifications. The selected foreign employees will be granted"skills and talents"visas(簽證). But some people show the concern that it’ll cause brain drain in 40 countries.

A. immigrants ?B. However

C developing ? ?D.path

E. open ? ? ? ? ? ? ?F. tough

G. effect ? ? ? ? ? ??H. Therefore

I developed ? ? ? J. permission

K. treated ? ? ? ? ??L.called

Testing: Is it the only way to Evaluate Students?

About ten percent of __1__ (spend)on primary and secondary education in the United States comes from the federal government. For ten years now, federal law has tied this cost to student __2__ (perform). States have been required to show progress through __3__ (year) testing.

States saying testing tells only part of the story about efforts by school and students to improve. So the Obama administration has eased the limits on states in __4__ (measure) performance.

The western state of Colorado for example, has a new __5__ (assess) method. The idea is to show __6__ (academy) growth, not just achievement on tests. It combines test scores, family income levels, school size, the ethnicity of the student and many other factors.

Josh Smith is principal of a middle school in a network of public charter schools __7__ (call). West Denver Prep Charter schools are publicly funded but not operated the same as __8__ (tradition) public schools. Mr. Smith says he likes to show his students this graph so they can see their school’s progress. On average, students enter sixth grade at West Denver Prep __9__ (perform) below grade level. __10__ (strange) enough, most are outperforming other students across the state three years later.