Film cameras and digital cameras work in a similar way.
Film cameras
After all, a film camera is basically a light – proof (不透光的) box. It has a lens (镜头) system to focus light onto the film at the back of the camera.
Let’s suppose that we are outside on a beautiful summer day trying to take a picture of the family dog. We are using a film camera. We finally get the dog to lie still. You point the camera at him. What happens? Light goes into the camera lens and hits the shutter. In other words, nothing happens yet. Now let’s say that the dog looks really cute and you decide to snap a picture. What happens? When you press the button, the shutter opens for a very short period of time. A small amount of light passes through and hits the film at the back of the camera. This creates an upside-down and reversed (反向的)image on the film.
When you finish the roll of the film, you can take it to the photo shop to develop it and you will have a great picture of your dog!
Cameras come with different lens lengths. Why does it matter? Many small cameras have shorter focal lengths, which means that there is a small distance between the lens and the place where the light focuses at the back of the camera. This gives you a large view of the area you are taking a picture of. Lenses with a long focal length show a smaller area but allow you to focus on distant objects and make them bigger. They are often called telephoto lenses. A good example of a long focus lens is one that is used by sports photographers to get photos of football players as if they were standing right beside them.
Digital cameras
In digital cameras, the light falls not on film but onto a sensor (传感器) called a CCD (Charge Coupled Device). This digitally converts(转变) light and color into a digital information or pixels (象素). The CCD is the heart of any digital camera and usually the most expensive part ---- depending on how good it is.
68．Which of the following statements is TRUE?
A．Both digital and film cameras focus light onto the film.
B．All cameras have a sensor.
C．Digital cameras and film cameras have something in common. .
D．Small cameras usually have longer focal lengths.
69．In the “Film cameras” part, you fail to take the picture of the dog because _____.
A．light goes into the camera lens and hits the shutter
B．you haven’t aimed the camera at the dog
C．the image of the dog is not created
D．the sensor fails to convert light and color into a digital information
70．The main reason that sports photographers can get clear and big photos of players is that _ ___.
A．they use digital cameras B．the lens of their cameras is excellent
C．their focus lenses are short D．their focus lenses are long
71．Generally speaking, a digital camera’s price is ____.
A．closely related to the quality of the CCD
B．irrelevant to the quality of the CCD
C．closely related to the lens
D．irrelevant to the lens
I keep hammering this because I keep seeing people who don’t do it.
1. Look up English to Elvish.
2. Look up the Elvish word in the best Elvish dictionary you have, and, preferably, find out the context（上下文） in Tolkien’s language dictionary.
3. Change the word to suit rules of grammar: singular or plural, mutations, verb tenses, etc.
You cannot leave out any of these steps. If you do, you’re almost certain to have errors. Why you have to do step 2:
Languages never match up one- to-one. English and Elvish are closer than usual, but there are still problems. And English has strange idioms: why are there no baths or beds in public bathrooms or restrooms? You can’t translate literally（逐字地）. You have to understand the meaning behind each word.
In Elvish this is even more true, since our dictionaries contain more or less questionable reconstructions, and words that Tolkien later threw away or replaced. Find the best one you can.
Consider the word “fair”. We tend to use it to mean “just”. Tolkien tends to use it to mean “beautiful”. In Elvish, these are two entirely different words. So when you look up “fair”, you’ll have to go to the Elvish dictionary to see that you’ve got the right one.
Consider the nightmare（噩梦）of He left the bar. Is “left” the opposite of “right” （which also has two meanings） ? Is “bar” extruded steel（型材钢）, or something to do with law? You have to know what words mean in both languages.
And you’d be amazed at how many people ignore step 3, forgetting that language is more than a string of words, and there are rules about how to fit those words together. You can’t simply look up the word “I” and use it everywhere. Sometimes you need “me” or “my”. There’s a reason it takes a while to learn a language: you have to learn the rules.
It drives me completely mad when people give a questionable translation they insist is right because “it’s in the dictionary”. A dictionary is a tool, a resource. but its entries（词目）should not be mistaken for a finished product. They are raw materials.The underlined word “this” in paragraph 1 refers to .
A．consulting the dictionaries when translating between language s |
| B．finding out the true meaning in context |
| C．ignoring the rules of grammar |
| D．leaving out some of the three steps the author mentions |
According to the author, you have to do step 2 because .
| A．you have to understand the meaning behind each word |
| B．Elvish and English are quite different in forms |
| C．there are no baths or beds in public bathrooms |
| D．Elvish has some words which are hard to find |
Grammar is also very important because it .
| A．helps fit the words together |
| B．takes a while to learn a language |
| C．is a rule to obey |
| D．is often forgotten in translating |
In the last paragraph, the author shows .
| A．his impatience to those who insist their wrong translation is right |
| B．his puzzle to the questionable translation |
| C．the importance of the correct use of dictionaries |
| D．the mistaken entries in the dictionaries |
The passage is mainly about how to .
| A．learn a foreign language with a dictionary |
| B．avoid errors when looking up a dictionary |
| C．understand the meaning of a strange word |
| D．use a dictionary to translate between languages |
Have you ever heard a news reporter talk about DNA? Reporters talk about DNA found at the scene of a crime. They talk about police finding DNA “fingerprints.” Police sometimes use DNA as a clue to find out who committed the crime.
DNA is a substance（物质） that makes up genes. Everything alive has genes. Plans have genes. Animals have genes. Yo
u have genes.
Genes are the basic units of heredity（遗传）. Heredity means all the characteristics you inherit from your parents. You get your genes from your parents. You inherit half of your genes from your mother. You inherit half of your genes from your father.
Genes are a kind of code. A tree’s genes tell w
hat shape its leaves will be. A cat’s genes tell what color its fur will be. Your genes tell what color your eyes will be. Your genes tell what color your hair will be. Everything about you co
mes from the code in your genes.
Genes line up on strands（链） called chromosomes（染色体） in cells. Everything alive is made up of cells. Chromosomes are in the center, or nucleus, of cells.
Different parts of you are made of different kinds of cells. Your muscles are made of muscle celIs. Your skin is made of skin cells. The code in your genes tells your body to make different kinds of cells. The genes in each cell tell the cell how to work. They tell the cell when to make new copies of itself.
An Austrian monk named Gregor Mendel first saw inherited patterns in pea plants. He experimented with pea plants in the 1860s. One of the things, or traits（特质）， Mendel studied was what makes some pea plants tall and some short. He said that the traits must come from units of heredity passed from the parent plants. These units were later called genes.
In the mid-1900s, scientists discovered that genes are made of DNA. In the 1970s, scientists learned how to change DNA with genetic engineering. Scientists also learned that problems with certain genes cause diseases. Muscular dystrophy, cystic fibrosis, and hemophilia are some genetic diseases-diseases caused by problems in genes. Today, scientists are looking for ways to cure genetic diseases by changing genes through a process called gene therapy. What is DNA?
| A．DNA is a kind of gene. |
| B．DNA is a substance that makes up genes. |
| C．DNA is the basic unit of heredity. |
| D．DNA is a measure to protect crime. |
Which of the following about genes is correct according to the passage?
| A．Plants, animals and human beings have the same genes. |
| B．Half people inherit all genes from their mother, others from their father. |
| C．Genes decide the trees shapes, the cats’ fur color and our eyes’ color as well. |
| D．Genes will give you a code when you need them. |
Where are genes?
| A．Genes lining up on strands called chromosomes are in the center of cells. |
| B．Genes hide in everything alive in your body. |
| C．Genes can be nowhere but in your mind, controlling all your actions. |
| D．Genes travel in your body and help cope skin, muscle, and eyes. |
An Austrian monk named Gregor Mendel .
| A．first saw inherited patterns in people |
| B．was interested in why plants were different |
| C．first called the units of heredity from parents genes |
| D．was the first who discovered genes |
We can conclude that .
| A．scientists were less intelligent than monks in 1900s |
| B．some genes are bad and can cause diseases |
| C．we don’t need to worry about genetic diseases any longer |
| D．the discovery of genes may be of great help in our daily life |
The Crowne Plaza Copenhagen Towers has been named the greenest one in the world by the travel and tourist organization Skaal International, reported the Danish news agency Ritzau on Monday.
The hotel has been awarded the EcoTourism Award for setting an envir
onmental-friendly example to other hotels, said the report.
The Crowne Plaza Copenhagen Towers is located in the Copenhagen suburb of Oerestad and has the largest solar cell facility in the Nordic. This facility delivers energy to the hotel while Danish groundwater supplies cooling and heating in the air condition of the hotel.
The Crowne Plaza Copenhagen Towers
TV and lights in the hotel are all of energy-saving brands. Shampoo bottles, toothbrushes and washing accessories are biologically degradable, which means that the nature can easily absorb the materials.
The hotel restaurant is only buying local goods and the food leftovers are used for bioenergy as well as fertilizer. The fitness facilities also provide a green touch to the hotel, as the training bikes of the fitness center are linked to the power grid（电网） of the hotel, thereby providing free energy if any guest wishes to exercise. People who do contribute free energy this way are supp
osedly getting a free meal in the hotel restaurant. “It is the first time that a Danish hotel receives this award. I think our throughout green thinking is the reason why we have been awarded. It is all the small details, as well as the big picture，” says Allan Agerholm, the CEO of the hotel, in a press release.
The Crowne Plaza Copenhagen Towers opened its doors last year. Skaal International was founded in 1932 by travel managers and has approximately 20,000 members in 89 nations. It is an organization promoting global tourism.Which of the following is the best title of this passage?
| A．Hotel in Copenhagen named world’s greenest |
| B．Copenhagen-the world’s greenest city |
| C．Eco Tourism Award in Copenhagen |
| D．The Crowne Plaza Copenhagen Towers |
The hotel has been awarded the EcoTourism Award because .
| A．delivers green energy to the hotels in Nordic |
| B．is located in the Copenhagen suburb not in the city center |
| C．has the largest solar cell facility |
| D．it sets an environmental-friendly example to other hotels |
The underlined word “degradable” in passage 3 means it can be .
| A．rejected by people who don’t like it |
| B．accepted by guests from all over the world |
| C．absorbed easily by nature |
| D．recycled by the nature |
What is s
o special about the fitness facilities?
| A．It is free for those who like to exercise. |
| B．It uses green power to drive. |
| C．It generates free electricity while being used. |
| D．It offers free meal to guests who use it. |
What is Skaal International?
| A．Another name for this green hotel. |
| B．An organization promoting global tourism. |
| C．The Danish news agency Ritzau. |
| D．A branch hotel restaurant in Danmark. |
Hundreds of people lined up at Grand Central Terminal yesterday, but they
weren’t there to catch a train. They came to New York City’s famous railroad station to trade in old dollar bills for the new George Washington Presidential苊1 coin.
The gold-colored coin is the first in a new series by the U.S. Mint（造币厂）that honors former U.S. Presidents. The Mint will issue(发行) four Presidential苊1 coins a year through 2016. Like the popular 50 State Quarters program, which issues coins in the order in which each state joined the Union, Presidential苊1 coins will come out in the order in which each President served. The George Washington coin is the first to be released. John Adams, Thomas Jefferson and James Madison coins will come out later this year.
The Presidential 苊1 coins will be the same size and color as the Sacagawea Golden Dollar. However, there is an important difference. For the first time since the 1930s, there is an inscription（题字）on the edge of each coin. Each coin will show a different President on its face, or head side. It will also show the President’s name, the order in which he served and his years in office. The other side of the coin will show the Statue of Liberty and the inscriptions “United States of America” and “苊 1”.
There will be one Presidential苊1 coin for each President, except Grover Cleveland. He will have two! Cleveland is the only U.S. President to have served two nonconsecutive（不连续的）terms.
The last President scheduled to get a coin is Gerald Ford because a President must have been dead for two years before he can be on a coin. Why did people line up at the railway station?
| A．To book train tickets. | B．To exchange money. |
| C．To visit a coin show. | D．To visit the station itself. |
In which order will the Presidential苊1 coins come out?
| A．Each state joined the Union. | B．Each President was born. |
| C．Each President took office. | D．Each President died. |
It can be inferred from the passage that .
| A．there are no words on the Sacagawea Golden Dollar |
| B．the new coin can buy more than the old coin |
| C．the new coin takes on a white color |
| D．the Sacagawea Golden Dollar is bigger |
Why will Grover Cleveland have two coins?
| A．He served longer than any other President. |
| B．He is the most famous President in the U.S. |
| C．He is the only one who has served two terms. |
| D．He served two terms but not continuously. |
Which of the following could be the best title of the passage?
| A．Presidential苊1 coin issued. |
| B．Different ways to honor Presidents. |
| C．The differences between Presidential苊1 coin and other coins. |
| D．Collections of old dollar bills. |
America’s greatest technological achievement, the Hoover Dam, now has a companion piece, a bridge held up by the longest arch in the Western Hemisphere（半球）. The Mike O’Callaghan-Pat Tillman Memorial Bridge, which opened this month and connects the U.S. states of Arizona and Nevada, crosses the vast chasm（峡谷）890 feet above the Colorado River that is controlled by the dam.
The striking 1,900-foot-long structure will improve traffic in the region and help protect the dam from being destroyed. It is the seventh highest bridge in the world, behind four in China, one in Papua New Guinea and one in the US state of Colorado.
“The Hoover Dam is the greatest civil engineering achievement in America’s history,” said the bridge project manager Dave Zanatell. “Our goal was not to outdo or outshine it. Our goal was to, in a respectful way, do something that would be great for our generation and that would stand besides Hoover Dam in a respectful and quality way that would become a part of Hoover’s legacy（遗产）.”
Just as the Hoover Dam was built in the heart of the Great Depression（大萧条）and was seen as an example of the nation’s can-do spirit, some hope this project can also provide some uplift.
The bridge is surprising: at 1,050 feet, its support arch holds up a roadway that lies on 300-foot-long concrete pillars（柱子）, some of the tallest in the world. It contains 16 million pounds of steel.
The idea of the bridge came into being in the 1960s because the top of the Hoover Dam has been a narrow two-lane road that is the fastest route from Arizona to Las Vegas and then the Pacific Northwest and Canada.
Access to the dam from each direction is a dangerously winding route, but massive trucks and passenger vehicles shared it for decades. During the day, when thousands of tourists travel to the dam from Las Vegas three times as many accidents as on a normal road will happen.
The bridge has a sidewalk on the side facing the dam. The wall on both sides is 54 inches high, so walkers can take photos there.Which of the following is true of the Hoover Dam?
| A．It was completed recently. |
| B．It was built during the hard times. |
| C．It has the longest arch. |
| D．It’s the seventh highest dam in the world. |
What is one of the purposes of building the bridge?
| A．To protect the dam. | B．To save the cultures. |
| C．To outdo the dam. | D．To develop the tourism. |
The underlined word “uplift” in Paragraph 4 means _____.
| A．lift of the heavy object | B．support in money |
| C．spiritual encouragement | D．instruction in technology |
Which of the followings shows the right position of the bridge and dam?
The text is mainly about ______.
| A．the Hoover Dam |
| B．American western development |
| C．a tour along the Colorado River |
| D．a recently built bridge |