Vitamin D helps bones and muscles grow strong and healthy. Low levels of vitamin D can lead to diseases such as rickets (佝偻病), mainly found in children. The thinning of bone is a common problem as people, especially women, get older.
But more and more research is suggesting that vitamin D might also help prevent many diseases. The easiest way to get vitamin D is from sunlight. The sun’s ultraviolet (紫外线的) rays react with skin cells to produce vitamin D. But many people worry about getting skin cancer and skin damage from the sun. As a result they stay out of the sun. Also, darker-skinned people produce less vitamin D than lighter-skinned people. The amount also decreases in older people and those living in northern areas that get less sunlight.
Not many foods naturally contain vitamin D. Foods high in this vitamin include oily fish and fish liveroils (鱼肝油). Farmed fish have only about one-fourth as much vitamin D as wild fish. Small amounts of vitamin D are found in beef liver, cheese and egg yolks. But most of the vitamin D in the American diet comes from foods such as milk.
Research in the last several years has shown that low levels of vitamin D may increase the risk of heart attacks in men and deaths from some cancers. More doctors are now having their patients tested for their vitamin D levels. But as research continues, some experts worry that if people take too much vitamin D, it might act as a poison. Also, skin doctors warn people to be careful with sun exposure because of the risk of skin cancer.The first paragraph is mainly about .
| A．the muscle diseases | B．the sources of vitamins |
| C．the importance of health | D．the functions of vitamin D |
Which of the following people produce the least amount of vitamin D?______
| A．Elderly darker-skinned people. | B．Young lighter-skinned people. |
| C．Elderly lighter-skinned people. | D．Young darker-skinned people. |
People can get the most vitamin D from .
| A．beef liver | B．cheese | C．wild fish | D．farmed fish |
What can we infer from the text?_________
A. Being exposed to sunlight is the safest way to get vitamin D.
B. Lack of vitamin D can make people age quickly.
C. Proper vitamin D levels people need are still not determined now.
D. The vitamin D level is higher in men than in women.
This is VOA. The National Cryptologic Museum is on Fort George G. Meade, a military base near Washington, DC. The method of hiding exact meanings is called coding. People have used secret codes throughout history to protect important information. The National Cryptologic Museum celebrated 60 years of cryptologic excellence in 2012. One event there marked the sixtieth anniversary of the National Security Agency. Two former NSA workers shared their memories of operating a code machine called Sigaba.
In 1940, an American woman named Genevieve Grotjan found some information being repeated in Japanese coded messages. Her discovery helped the United States understand secret Japanese diplomatic messages. After the United States understood the code, it was possible to study messages from the Japanese ambassador to Germany and to his supervisors in Japan.
Understanding these messages helped the United States prepare for a possible war in the Pacific with Japan. After the attack on Pearl Harbor, an American Naval officer named Joseph Rochefort struggled to understand the Japanese navy code. He worked on the American base at Pearl Harbor. It was early in 1942. The American naval commander in the Pacific Ocean was Chester Nimitz. His forces were much smaller than the Japanese Naval forces. And the Japanese had been winning many victories. Joseph Rochefort had worked for several months to read the secret Japanese Naval code called JN-25. If he could understand enough of the code, he would be able to give Admiral Nimitz very valuable information.
From the beginning of 1942, the Japanese code discussed a place called "AF." Joseph Rochefort felt the Japanese were planning an important battle aimed at "AF." After several weeks, he and other naval experts told Admiral Nimitz that their best idea was that the "AF" in the Japanese code was the American-held island of Midway. Admiral Nimitz said he must have more information to prepare for such an attack.
The Navy experts decided to trick Japan. They told the American military force on Midway to broadcast a false message. The message would say the island was having problems with its water-processing equipment. The message asked that fresh water be sent to the island immediately. This message was not sent in code.
Several days later, a Japanese radio broadcast in the JN-25 code said that "AF" had little water. Joseph Rochefort had the evidence he needed. "AF" was now known to be the island of Midway. He also told Admiral Nimitz the Japanese would attack Midway on June 13.The battle that followed was a huge American victory. That victory was possible because Joseph Rochefort learned to read enough of the Japanese code to discover the meaning of the letters "AF."
One American code has never been broken. Perhaps it never will. It was used in the Pacific during World War Two. For many years the government would not discuss this secret code. Listen for a moment to this very unusual code. Then you may understand why the Japanese military forces were never able to understand any of it.
The code is in the voice of a Native American. The man you just heard is singing a simple song in the Navajo language. Very few people outside the Navajo nation are able to speak any of their very difficult language.
At the beginning of World War Two, the United States Marine Corps asked members of the Navajo tribe to train as Code Talkers.
The Cryptologic Museum says the Marine Corps Code Talkers could take a sentence in English and change it into their language in about 20 seconds. A code machine needed about 30 minutes to do the same work.
The Navajo Code Talkers took part in every battle the Marines entered in the Pacific during World War Two. The Japanese were very skilled at breaking codes. But they were never able to understand any of what they called "The Marine Code."
The Cryptologic Museum has many pieces of mechanical and electric equipment used to change words into code. It also has almost as many examples of machines used to try to change code back into useful words.The NSA was founded__________.
| A．in 1940 | B．1942 | C．in 1952 | D．in 2012 |
According to the passage, which one is not right?
| A．“Cryptologic” implies containing some hidden information |
| B．The US decoded “AF” and won the victory in Midway Islands |
| C．Both Rchefort and Nimitz were American navy commanders |
| D．The US Marine Corps was fallen for in Midway Islands battle |
The Americans used the Navajo language in their coding system during the Second World War for the reason that .
| A． unusual language was successfully used for codes |
| B．it was commonly used in coding system worldwide |
| C．the United States Marine Corps invented it then |
| D．it was the most beautiful language in the world |
This passage is probably adapted from ____________.
| A．an evening paper | B．a science fiction |
| C．a broadcasting program | D．a travel guidebook |
Superstorm Sandy’s march of destruction claimed at least 43 lives and left more than eight million people without electricity by late Tuesday, in one of the largest storms ever to strike the East Coast.
Less violent but still dangerous, the storm swept across Pennsylvania on Tuesday and the northeastern US began its slow process of recovery. As dawn broke Tuesday on the storm’s trail of destruction, it began exposing stories of heroism and tragedy, bad decisions and lucky breaks.
In Broad Channel in New York City, a 29-year-old mother was forced to dive and swim out of her house’s front window with her 8-year-old daughter. And in Freeport, N.Y., Nicole Smith returned home --- to find a boat on her lawn. She asked passers-by for $5 to take a snapshot. A 13-year-old girl was found dead, in her pajamas, a block from her washed-out Staten Island home. On Monday night, Sandy’s waves ripped out the entire deck of Jeffrey Ratner’s home, along with the back wall. Still, Mr. Ratner said, he remains optimistic about the future. “We are going to rebuild it,” he said.
The official warnings to evacuate(疏散)were clear, a couple said. But staying home just seemed easier. “It’s not their fault; it’s ours,” said Mary Norton, 88, head in her hands. “We did not leave.”
New York’s extensive transit system, a lifeline for millions of commuters(上下班往返的人), suffered the greatest damage as floodwaters drowned all seven subway tunnels connecting Manhattan and Brooklyn. Jseph Lhota, Chairman of the Metropolitan Transportation Authority, described it as the most destroying in the 108-year history of the New York subway.
Forecaster said Sandy, which had maximum continuing winds of 45 miles an hour Tuesday afternoon, would cross western Pennsylvania on Tuesday night before moving into Canada on Wednesday as it meets cold air fronts. Another inch of rain was expected from the eastern Great Lakes across the mid-Atlantic and into southern New England.The passage mainly talks about________.
| A．New York’s extensive transit system |
| B．when and why superstorm formed |
| C．the latest information about Sandy |
| D．superstorm Sandy’s destruction in America |
Mary Norton and her husband didn’t leave their home because________.
| A．they didn’t know a superstorm was on the way |
| B．they didn’t believe the government’s warnings |
| C．they didn’t want to take the trouble to move |
| D．they had no chance of leaving before Sandy hit the area |
The transit system mentioned in the last paragraph but one refers to_________.
| A．the bus route | B．the ship route |
| C．the flight course | D．the subway route |
Which of the following statements about Sandy is WRONG?
| A．It had killed at least 43 lives when the news was released. |
| B．It would move into Canada on Tuesday night. |
| C．It would bring another rain to the eastern Great Lakes |
| D．It led to power failure in many areas in America. |
Never before in Chinese history has a documentary film aroused so much public enthusiasm. Everybody is talking about a new 7-part documentary called A Bite of China which was recently broadcast late at night on CCTV I. The documentary describes various gourmet items across the vast Chinese culinary (烹饪) landscape.
According to Taobao, China’s biggest online retail website, just five days after the series began to air, nearly 6 million people went to the site in search of various local specialties, particularly those mentioned in the documentary. More than 7.2 million deals were concluded. A ham producer from Yunnan Province saw his sales grow 17-fold in five days.
However, one can’t help but believe that the documentary’s popularity is probably linked to the endless stream of terrible food security issues that have emerged in recent years. In one well-received article, a netizen wrote, “I wonder how many felt so empty-hearted and sighed after watching the film. Blue-vitriol watered chive, formaldehyde(甲醛) sprayed cabbage, Sudan Red colored salty eggs, restaurants using gutter oil. The list is long…”
A varied and ancient food culture that is famous world-wide and which should have made the Chinese proud ends like this: one can only sigh. Food is the most vital thing in people’s lives. Yet China’s food industry is a typical description of “bad money driving out the good”.The market is huge while the cost of faking and cheating is so low for unscrupulous (不道德的) businessmen; and the punishment is too light. Take the milk industry as an example. Although Sanlu, the company that sold the melamine-adulterated milk powder, was punished, thousands of other dairies didn’t work hard to improve the quality. In order to allow national brands to survive, Chinese authorities are happy to loosen their regulations.
As the documentary shows, people are attracted not to gourmet items like matsutake, a species of rare mushroom grown naturally in remote forests, but to common Chinese dishes like barley, lotus root or tofu. They are what meet our basic needs. This explains why people are so excited about A Bite of China---it is a reminder that there is still a world out there where food is excellent and people have dignity.The underlined word “gourmet items” probably means________.
| A．beautiful clothes | B．latest technology |
| C．delicious food | D．great inventions |
The second paragraph mainly talks about______.
| A．The popularity of the documentary |
| B．the content of the documentary |
| C．the history of Chinese gourmet |
| D．the producer of the documentary |
We can infer from what a netizen wrote in one well –received article that ______.
| A．none of the television viewers have a knowledge of the Chinese food culture |
| B．there is a huge contrast between the ancient food culture and the reality |
| C．the price of food is too high for many common people |
| D．the documentary was made by a world-famous Chinese director |
According to the passage, China’s food industry is full of faking and cheating because_____.
| A．there are still so many poor people at the present time |
| B．the punishment for unscrupulous businessmen isn’t serious enough |
| C．the Chinese government encourages it to do so |
| D．the food technology is not so advanced as in developed countries |
An incredible dog has mastered more than just the doggy paddle (狗刨式游泳) — the golden brown pet helps disabled children learn how to surf. Ricochet’s owner Judy Fridono said, “I was working with her at balance and coordination (协作). Her balance is so good that she can help to stabilize the board for the kids. And it makes them feel good to know that Ricochet is there with them, keeping them company.”
After becoming an expert, two-year-old Ricochet helps the disabled children build up the confidence to get on the board themselves. Dressed in a yellow jacket, Ricochet helps to counter-balance the board and acts as a reassuring presence.
Ms. Fridono knows what an impact her beloved dog can have. She herself was severely disabled since her teens. Having Ricochet around lifts her spirits, and inspires her to conquer her pain to get on the board. “Ricochet has taught me to focus on what I can do, rather than what I can’t,” she said.
One of those who have benefited from Ricochet’s skills is six-year-old Ian McFarland. In 2008 a car crash left him with brain damage. Although he had loved surfing before the accident, he was too nervous to go back into the water. His fear turned to excitement, when he was told he could try a tandem (双人) surf session with Ricochet. Their session was a success and by the end of it, Ian was smiling from ear to ear. As well as helping with treatments, Ricochet also raised £5,000 to help continue Ian’s recovery.
Over the last 10 months, Ricochet’s excellent performances on the sea have raised more than £30,000 for a number of charity causes.
According to the passage, Ricochet is .
| A．a dog | B．a doctor |
| C．a dog owner | D．a disabled boy |
What role does Ricochet play according to the passage?
| A．She acts as a pet to please its owner. |
| B．She accompanies the disabled children at home. |
| C．She works as a guide dog for the blind |
| D．She helps the disabled children learn to surf. |
Which statement can best describe Ricochet?
| A．The two-year-old dog is severely disabled. |
| B．Ricochet helps youngsters build up their confidence. |
| C．Ricochet helps youngsters in their daily life. |
| D．Ricochet is a lifesaver on the sea. |
Everyone gathered around and Paddy read out loud, slowly, his tone growing sadder and sadder. The little headline said: BOXER RECEIVES LIFE SENTENCE.
Frank Cleary, aged 26, professional boxer, was today found guilty of the murder of Albert Gumming, aged 32, laborer, last July. The jury(陪审团) reached its decision after only ten minutes, recommending the most severe punishment to the court. It was, said the Judge, a simple case. Cumming and Cleary had quarreled violently at the Harbour Hotel on July 23rd and police saw Cleary kicking at the head of the unconscious Gumming. When arrested, Cleary was drunk but clear-thinking.
Cleary was sentenced to life imprisonment with hard labour. Asked if he had anything to say, Cleary answered, “Just don’t tell my mother.”
“It happened over three years ago,” Paddy said helplessly. No one answered him or moved, for no one knew what to do. “Just don’t tell my mother,” said Fee numbly(麻木地). “And no one did! Oh, God! My poor, poor Frank!”
Paddy wiped the tears from his face and said. “Fee, pack your things. We’ll go to see him.”
She half-rose before sinking back, her eyes in her small white face stared as if dead. “I can't go,” she said without a hint of pain, yet making everyone feel that the pain was there. “It would kill him to see me. I know him so well—his pride, his ambition. Let him bear the shame alone, it’s what he wants. We’ve got to help him keep his secret. What good will it do him to see us?”
Paddy was still weeping, not for Frank, but for the life which had gone from Fee’s face, for the dying in her eyes. Frank had always brought bitterness and misfortune, always stood between Fee and himself. He was the cause of her withdrawal from his heart. Every time it looked as if there might be happiness for Fee, Frank took it away. But Paddy’s love for her was as deep and impossible to wipe out as hers was for Frank.
So he said, “Well, Fee, we won’t go. But we must make sure he is taken care of. How about if I write to Jones and ask him to look out for Frank?”
There was no excitement in the eyes, but a faint pink stole into her cheeks. “Yes, Paddy, do that. Only make sure he knows not to tell Frank we found out. Perhaps it would ease Frank to think for certain that we don’t know.”Paddy cried because he thought ___________.
| A．Frank did kill someone and deserved the punishment |
| B．Frank should have told Fee what had happened |
| C．what had happened to Frank was killing Fee |
| D．Frank had always been a man of bad moral character |
The underlined sentence “She half-rose before sinking back…” in Paragraph 6 shows that___________.
| A．Fee was so heart-broken that she could hardly stand up |
| B．Fee didn’t want to upset Paddy by visiting Frank |
| C．Fee couldn’t leave her family to go to see Frank |
| D．Fee struggled between wanting to see Frank and respecting his wish |
What can be inferred from Fee’s words?
| A．The jury and the judge agreed on the Boxer’s Sentence of Life Imprisonment. |
| B．The police found Gumming unconscious, heavily struck by Frank. |
| C．The family didn’t find out what had happened to Frank until 3 years later. |
| D．Frank didn’t want his family to know the sentence to him, most probably out of his pride. |
What is Frank and Paddy’s probable relationship with Fee?
| A．Frank is Fee’s son and Paddy is Fee’s brother. |
| B．Frank is Fee’s son and Paddy is Fee’s husband. |
| C．Frank is Fee’s brother and Paddy is Fee’s lover. |
| D．Frank is Fee’s lover and Paddy is Fee’s husband. |
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