Joseph Goldberger was a doctor for the Unite States Public Health Service. In 1912，he began to study a disease that was killing thousands of people in the South. The disease was pellagra（烟酸缺乏病）.
Doctor Goldberger traveled to the state of Mississippi where many people had pellagra. He studied the patients and their families. Most of the people were poor. The doctor came to believe that the disease was not passed from one person to another, but instead had something to do with food.
He received agreement from state officials to test this idea at a prison（监狱）. Prisoners were offered pardons if they took part. One group of prisoners received their usual food, mostly corn. A second group ate meat, fresh vegetables and milk. Members of the first group developed pellagra. The second group did not.
But some experts refused to accept that poor food caused pellagra. They thought there were other causes.
So Doctor Goldberger put blood from a person with pellagra into his own body. He even took pills that had blood from pellagra patients. An assistant also took part in the experiments. So did Doctor Goldberger's wife. None of them got sick. Later, the doctor discovered that a bit of dried brewer's yeast （酿酒的酵母）each day could prevent pellagra.
Joseph Goldberger died of cancer in 1929. He was 55 years old. Several years later, researchers discovered the true cause of pellagra ： having little of the vitamin B. How old was Doctor Goldberger when he began to study pellagra?
| A．22. |
| B．30. |
| C．38. |
| D．55. |
The underlined words " this idea" （in Paragraph 3） refers to __________.
| A．the guessing that pellagra had something to do with food |
| B．a kind of yeast that prevented pellagra |
| C．pellagra that was easily passed from one person to another |
| D．a poor food that caused pellagra |
Which is the right order about what Doctor Goldberger did?
a. He did a test on prisoners at a prison.
b. He did the experiments on himself.
c. He came to Mississippi to study the patients and their families.
d. He found poor food was easy to cause pellagra.
e. He discovered a little dried brewer's yeast every day could prevent pellagra.
| A．a, d，c, e，b |
| B．c, a，d, b，e |
| C．b, e，c, a，d |
| D．c, b，e, a，d |
This passage mainly tells us __________.
| A．Doctor Goldberger's life |
| B．something about pellagra |
| C．Doctor Goldberger's work experience |
| D．Doctor Goldberger's study on pellagra |
Dear Sirs，
Your shipment(装运)of twelve thousand“Smart”watches was received by our company this morning．However，we wish to make a number of complaints concerning the serious delay in delivery and your failure to carry out our instructions．
It was stressed from the beginning that the delivery date had to be less than six weeks. While we appreciate that delays in production are occasionally unavoidable．We must point out that the major reason why the order was placed with your company was that we were assured by you that your existing stocks ensure immediate shipment．Late delivery of the goods has caused us to disappoint several of our most valued customers．and is sure to have a negative effect on future orders．
The second complaint concerns the difference in colour．Only half the watches in the delivery received are of the colours we ordered．Our Hong Kong agent assures us that she stressed to you the importance of following our instructions．Since we consider there to be only a limited market in this country for watches of other colours．Any watches that are not of the specified colours will , of course, be returned to you．
We are also somewhat concerned about the rather poor quality of the goods received．since it is obvious that the watches that finally arrived have been produced from inferior materials and have been made to a lower standard than those in the sample．We have also found that a number of the watches do not appear to be functioning．We should like to point out that we feel this matter to be entirely your responsibility．
As a result of the above problems，therefore，we feel that the most suitable course of action is to return to you unpaid any of the goods considered unsatisfactory，and to deduct(扣除)any costs from our final settlement．We shall also be forced to reconsider whether any further orders should be placed with your company.
We look forward to your immediate reply．
Yours sincerely，
John SmithHow many complaints does John Smith make with the“Smart”watch producer?
| A．Five． | B．Four． | C．Three． | D．Two． |
The producer of“Smart”watches were given the order because_________
| A．they produced the best watches of its kind in the world |
| B．the watches would be easy to make and the designs were already prepared |
| C．they promised they could produce enough stocks quite quickly |
| D．they claimed the order would be easy since the watches were already in stock |
Receiving watches in the wrong colours is a problem because_______
| A．the Hong Kong agent stressed the need to fulfill the order exactly |
| B．these watches will be difficult to sell． |
| C． these watches will not be able to get into the limited market |
| D．people will not buy the watches at present |
LONDON (AP) — England joins on Sunday the growing list of places that ban smoking in public buildings, taxis and other places including even Buckingham Palace with a tough law.
Pubs, clubs and restaurants will all be smoke-free. Taxi and delivery drivers have been warned that they too could be fined 50 pounds, or about $100, if caught lighting up inside work vehicles.
Experts say the bans have become an irreversible (不可逆转的) tread because of greatly rising health costs and public uneasiness over second-hand smoke. Some of the strictest smoking bans are in the United States, even though there is no federal anti-smoking policy. New York and Florida have strict bans, while California has certain outdoor smoking bans.
Spain, Italy, Iran, Norway, Sweden, Singapore, South Africa, Uruguay and new Zealand have passed legislation(立法) to restrict smoking. France banned smoking in many public places in February and plans to extend the ban to cafes and restaurants next year. Finland is introducing a ban in 2009.
Despite the spread of bans, the World Health Organization predicts a steady rise in tobacco sales. In its Tobacco Atlas, the WHO said that by 2030 there will be “at least another two billion smokers in the world” and an expected decrease in male smokers “will be offset by an increase in female smoking rates, especially in developing countries.”
In advance of the English ban, anti-smoking ads have coated bus stops and the British government has subsidized(资助) programs to help people quit. The rest of Britain—Scotland, Wales and Northern Ireland —already have smoking bans in place.The first two paragraphs mainly tell us_______
| A．Buckingham Palace bans smoking |
| B．smoking ban comes into force in England |
| C．there’s no smoking in Buckingham Palace |
| D．smoking is against the law in England |
Which of the following places may still be smoking areas in England?
| A．Private houses | B．Taxis. |
| C．Restaurants. | D．London clubs |
The underlined word “offset” in paragraph 5 probably means “________”.
| A．decreased | B．raised | C．encouraged | D．balanced |
What do we know from the passage?
| A．Smoking has strictly been forbidden in cafes in France. |
| B．There is an extremely strict smoking ban everywhere in America. |
| C．Smoking situation is still serious across the world. |
| D．Related ads didn’t appear in England until the English ban was lifted.（解除） |
Do your children always sit still and watch TV? If so, you should be very alert!
Nowadays, children watch television for long hours. They often spend evenings watching their favorite programs on TV. Sometimes they might stay up late to watch TV. Their addiction to television results in their not having time to play or do exercise. They should go outside with friends or spend time reading books. Moreover, watching television too much is harmful to their eyesight.
Researchers claim that attention deficit disorders in children are a result of watching too much television. They say that watching television leads to a developmental disorder in the part of the brain which is responsible for language skills. Children who watch television more and read less have greater difficulty paying attention and concentrating. Children that spend long hours watching television are more likely to be affected by attention deficit disorders.
Television is one form of media which is used to show all kinds of products. Watching too much television can lead to early exposure to a wide variety of things. Television advertisements may cause children to behave incorrectly or damage themselves. Advertisements about fast food, cold drinks or other such products that are not good for children’s health can have a bad effect on them. Some TV shows and films also affect how children think and behave.
Studies in psychology have shown that certain programs can have a long-lasting effect on children’s minds. Horror scenes and other frightening shows can have a negative effect on the minds of children watching them.
Television is a means of recreation but watching it too often is harmful to children’s physical and mental health. You need to help you children deep a balance of everything in life.The underlined word “deficit ” in the third paragraph most probably means _____.
| A．need | B．habit | C．fear | D．lack |
It’s implied in the last paragraph that you should ______.
| A．decide on when children can watch television |
| B．give children more time to play |
| C．help you children balance everyday life |
| D．stop you children from watching TV |
What is the passage mainly about?
| A．The bad effects watching TV has on children. |
| B．How many hours children should spend watching TV. |
| C．How advertisements affect children’s behavior. |
| D．What scenes children should not watch on TV. |
Which of the following are the effects of watching too much TV according to the passage?
a. causing children to have less time to read good books.
b. making children behave improperly
c. harming children’s eyesight
d. affecting the parent-child relationship
| A．a, b, d | B．b, c, d | C．a, b, c | D．a, c, d |
It's not just adults who have a thing or two to discuss with other people, babies too have their own social lives and enjoy group interaction, according to a world-first study.
The breakthrough study conducted by psychologist Professor Ben Bradley, at Charles Sturt University, could completely transform the way child-care centers are set up. In their study, the researchers examined groups of nine-month-old babies in new South Wales and Britain.
And they came across astonishing results—it was found that infants had “social brains” and focused not just on their mothers but on social 1ife in groups as well,
“They communicate with more than one baby at once，and show jealousy and generousness，”said Professor Bradley．
He added，“They develop their own meanings through group interaction，they notice if a group member is behaving differently and they take on roles，such as leaders and followers．”
“A baby who has a depressed mother tends to be withdrawn(内向的)，but put that same baby in a group of its peers(同龄人)and they behave and interact like any other baby．”
It was the first all-baby group study ever to be conducted．“Most studies of babies concentrate on the infant-mother relationship，assuming that is the single foundation for mental health．but babies are constantly involved with groups of people other than their mothers：fathers，siblings，grandparents and those taking care．Therefore。the ‘mother-baby approach’ needs to be combined with a‘ group approach’．”said Bradley．
Phoebe Christison ，a child-care worker at Camperdown Sunshine Bubs in Sydney’s inner west．said she often noticed what appeared．to be emotional attachments developed between toddlers．
She said，“Joel(10 months)and Isabella (11months)always like to hold hands when they sit in their high chairs and eat．And babies definitely show jealousy．They push and touch each other，and copy what the other is doing．”A baby who has a depressed mother ____．
| A．tends to be a follower |
| B．also enjoys group interaction |
| C．has poor social ability |
| D．pays more attention to its mother |
What can be inferred from the result of this study?
| A．Babies are affected by groups more than by their mothers． |
| B．There’s no need of child-care centers at a11． |
| C． Adults should include babies when having social activities． |
| D．The normal infant-mother bond alone isn’t enough for the good mental health for babies． |
The underlined word “toddlers” in Para．8 can be replaced by_________
| A．adults | B．infants | C．peers | D．groups |
The example given in the last paragraph proves that a baby________ .
| A．is born to be friendly to other babies |
| B．has interest in peers as well as in its mother |
| C．may have emotional attachments to another baby |
| D．shows jealousy and generousness as an adult |
You never see them, but they're with you every time you fly. They record where you are going, how fast you're traveling and whether everything on your airplane is functioning normally. Their ability to withstand almost any disaster makes them seem like something out of a comic book. They're known as the black box.
When planes fall from the sky, as a Yemeni airliner did on its way to Comoros Islands in the India ocean June 30, 2009, the black box is the best bet for identifying what went wrong. So when a French submarine (潜水艇) detected the device's homing signal five days later, the discovery marked a huge step toward determining the cause of a tragedy in which 152 passengers were killed.
In 1958, Australian scientist David Warren developed a flight-memory recorder that would track basic information like altitude and direction. That was the first mode for a black box, which became a requirement on all U.S. commercial flights by 1960. Early models often failed to withstand crashes, however, so in 1965 the device was completely redesigned and moved to the rear of the plane – the area least subject to（易遭受）impact – from its original position in the landing wells (起落架舱). The same year, the Federal Aviation Authority required that the boxes, which were never actually black, be painted orange or yellow to aid visibility.
Modern airplanes have two black boxes: a voice recorder, which tracks pilots' conversations, and a flight-data recorder, which monitors fuel levels, engine noises and other operating functions that help investigators reconstruct the aircraft's final moments. Placed in an insulated (隔绝的) case and surrounded by a quarter-inch-thick panels of stainless steel, the boxes can withstand massive force and temperatures up to 2,000℉. When submerged, they're also able to emit signals from depths of 20,000 ft.
Experts believe the boxes from Air France Flight 447, which crashed near Brazil on June 1, 2009, are in water nearly that deep, but statistics say they're still likely to turn up. In the approximately 20 deep-sea crashes over the past 30 years, only one plane's black boxes were never recovered.What information could be found from the black box on the Yemeni airliner?
| A．Data for analyzing the cause of the crash. |
| B．The total number of passengers on board. |
| C．The scene of the crash and extent of the damage. |
| D．Homing signals sent by the pilot before the crash. |
Why was the black box redesigned in 1965?
| A．New materials became available by that time. |
| B．Too much space was needed for its installation. |
| C．The early models often got damaged in the crash. |
| D．The early models didn't provide the needed data. |
Why did the Federal Aviation Authority require the black boxes be painted orange or yellow?
| A．To distinguish them from the colour of the plane. |
| B．To caution people to handle them with care. |
| C．To make them easily identifiable. |
| D．To obey international standards |
What do we know about the black boxes from Air France Flight 447?
| A．There is still a good chance of their being recovered. |
| B．There is an urgent need for them to be reconstructed. |
| C．They have stopped sending homing signals. |
| D．They were destroyed somewhere near Brazil. |