A deadly strain of avian flu may have passed between people for the first time, experts believe.The avian influenza A (H7N9) virus is thought to have been transmitted between father and daughter in eastern China, according to research published online by the British Medical Journal (BMJ).
The findings provide the strongest evidence yet of H7N9 transmission between humans since its discover in February, but its ability to transmit itself was deemed "limited and non-sustainable" by the Chinese researchers behind the study.At the end of June 133 cases had been reported, including 43 deaths. Most infections have been among people visiting markets, selling live birds or among those who had contact with live poultry（家禽） in the seven to 10 days before becoming ill.
The latest study examined the case of a 60-year-old father who regularly visited a live poultry market and became ill five to six days after his last visit in March. He was admitted to hospital with fever, cough and shortness of breath. Despite intensive care treatment he died of multiple organ failure on 4 May. His 32-year-old daughter, who was previously healthy, looked after him at his bedside before he was admitted to intensive care. She had no known exposure to live poultry before falling ill with a very high temperature, cough and fever. The daughter developed symptoms six days after her last contact with her father and was admitted to hospital where she died of multiple organ failure on 24 April.
Follow-up investigations(调查) uncovered almost genetically identical virus strains from each patient, suggesting transmission from father to daughter. Another 43 people were also tested who had had close contact with the father, daughter or both.
Dr Peter Horby, senior clinical research fellow at the Oxford University Clinical Research Unit in Hanoi, Vietnam, said of the study: "The most likely source of infection for the daughter was her father, during the period that she cared for him while he was ill. "He said “limited person to person transmission had been reported for other strains like H5N1 , H7N7, and the pig origin flu virus H3N2. Those strains had been around for more than a decade but have not progressed any further down the path towards a world-wide virus.” “Limited human-to-human transmission of H7N9 virus is therefore not surprising, but strengthening to monitor it was still needed,” Dr Horby added.What’s the main idea of the passage ?
| A．The findings about H7N9 transmission only between father and daughter . |
| B．H7N9 transmission may be spreading between people . |
| C．133 cases of H7N9 transmission have been reported . |
| D．Both the father and daughter died of multiple organ failure. |
The reason why the daughter died of multiple organ failure was that _____.
| A．she fell ill with a very high temperature, cough and fever. |
| B．she was exposed to live poultry before falling ill. |
| C．she had close contact with the father while caring for her sick father . |
| D．she sold live birds in five to six days before falling ill . |
Which of the following is Wrong about H7N9 transmission?
| A．It was limited and non-sustainable |
| B．It was person to person transmission |
| C．It wasn’t progressed any further down the path towards a world-wide virus. |
| D．It happened between father and daughter . |
The underlined word s “was deemed” in paragraph 2 probably means _______
| A．was decreased | B．was regarded as |
| C．was thought of | D．was developed |
What type of writing is the article likely to be ?
| A．A news report. | B．Popular science. |
| C．A medical report | D．A medical findings |
If you bought some candy months ago but never ate it, how can you tell whether it’s still safe to eat? The easiest way is to check the “expiration date (保质期)” printed on the wrapper. If that date has already passed, you’re likely to throw the candy away. But is that really necessary?
According to a new report from the US Natural Resources Defense Council (NRDC), tons of food is wasted each year, largely because people don’t fully understand what expiration dates, or “use-by dates”, actually mean.
Food dating was introduced in 1970s because customers wanted more information about the things that they were eating. When they first showed up, use-by dates were only supposed to indicate freshness because producers wanted their products to be tasted in their best conditions.
But the truth is that these dates aren’t related to the risk of food poisoning or food-born illness, according to Time News. However, most customers misinterpreted use-by dates and related them to the safety of the food, and they still largely do now.
Eggs, for example, can still be eaten three to five weeks after purchase even though the use-by date is much earlier. When their use-by dates pass, strawberry juice may lose its red color and biscuits may lose their crunch（松脆的口感）, but they are not harmful.
“It’s a confusing subject, the difference between food quality and food safety,” said Jena Roberts, vice president of National Food Lab, a US food testing company. “Even in the food industry I have colleagues who get confused.”
This is why scientists are calling for a standard explanation to be printed following the use-by dates. “We want this to be clearly communicated so customers are not misinterpreting the date and contributing to a lot of waste,” said Dana Gunders, a staff scientist with the NRDC.
But this won’t be a mistake that is easy to correct since people have believed it for so long. Another problem is that the quality levels of different foods change differently-some are still eatable long after their use-by date while others are not.
As a result, food industry officials are now thinking of changing the use-by date to a date indicating when food is most likely to throw away.According to the text, use-by date was first intended to ________.
| A．reduce the waste of food |
| B．show whether the food was fresh |
| C．show the safety of food |
| D．give a warming of food poisoning |
Which of following is TRUE?
| A．Most customers understand what use-by date mean. |
| B．Biscuits can’t be eaten when not as crunchy as they were bought. |
| C．“ Use-by dates” have existed for more than 50 years. |
| D．Even after their use-by dates pass, some food are still safe to eat. |
Scientists are calling for a standard explanation to be printed together with the use-by dates because________.
| A．Most consumers often misunderstand use-by dates |
| B．use-by dates are not helpful or reliable |
| C．more consumers get worried about food safety |
| D．the quality level of different foods changes differently |
Unlike chemists and physicists, who usually do their experiments using machines, biologists and medical researchers have to use living things like rats. But there are three Nobel prize-winning scientists who actually chose to experiment on themselves – all in the name of science, reported The Telegraph.
1. Werner Forssmann (Nobel prize winner in 1956)
Forssmann was a German scientist. He studied how to put a pipe inside the heart to measure the pressure inside and decide whether a patient needs surgery.
Experiments had been done on horses before, so he wanted to try with human patients. But it was not permitted because the experiment was considered too dangerous.
Not giving up, Forssmann decided to experiment on himself. He anaesthetized (麻醉) his own arm and made a cut, putting the pipe 30 centimeters into his vein (静脉). He then climbed two floors to the X-ray room before pushing the pipe all the way into his heart.
2. Barry Marshall (Nobel prize winner in 2005)
Most doctors in the mid-20th century believed that gastritis was down to stress, spicy food or an unusually large amount of stomach acid. But in 1979 an Australian scientist named Robin Warren found that the disease might be related to a bacteria (细菌) called Helicobacter pylori.
So he teamed up with his colleague, Barry Marshall, to continue the study. When their request to experiment on patients was denied, Marshall bravely drank some of the bacteria. Five days later, he lost his appetite and soon was vomiting each morning – he indeed had gastritis.
3. Ralph Steinman (Nobel prize winner in 2011)
This Canadian scientist discovered a new type of immune system cell called the dendritic cell. He believed that it had the ability to fight against cancer.
Steinman knew he couldn’t yet use his method to treat patients. So in 2007, when doctors told him that he had cancer and that it was unlikely for him to live longer than a year, he saw an opportunity.
With the help of his colleagues, he gave himself three different vaccines based on his research and a total of eight experimental therapies (疗法). Even though Steinman eventually died from his cancer, he lived four and a half years, much longer than doctors had said he would.The passage is mainly about _________.
| A．some dangerous experiments that Nobel prize winners did on themselves |
| B．difficulties that scientists went through in order to make important discoveries |
| C．the reasons why some scientists chose to experiment on themselves |
| D．three Nobel prize winners who did experiments on themselves |
Which of the following is TRUE according to the article?
| A．Forssmann’s experiment ended in failure. |
| B．Forssmann managed to do his experiment on different kinds of animals. |
| C．Barry Marshall succeeded by drinking some Helicobacter pylori. |
| D．Barry Marshall’s experiment on himself confirmed that most doctors’ belief about gastritis was correct. |
From the text, we can conclude that Ralph Steinman _________.
| A．discovered a new type of cancer cell called the dendritic cell |
| B．tried different therapies containing the dendritic cell on himself |
| C．knew that he himself would have cancer and die from it |
| D．believed that he was better than doctors at treating cancer |
When you put down your pens at the end of the college entrance exam, 12 hard years of study will have come to an end. Forget your studies for a while. It’s time to enjoy yourselves!
There are many ways to celebrate this special month of graduation. You can have photos taken with your classmates and teachers, or dine out together and exchange gifts.
High school students in Western countries such as the United States and Canada usually have a prom to mark their graduation. It’s to mark the time kids turn into young men and women. After the prom, teenagers either go to college or find a job. It means they are no longer as dependent on their parents as they were before.
At the prom, boys usually dress in dinner jackets and bow ties, though many different types of formal clothes are worn. Traditionally, girls give boys matching boutonnieres (a small collection of flowers they pin to their jackets). Girls traditionally wear formal dresses, or dress to shock or be noticed, in shiny or brightly colored materials.
Common prom activities include dining, dancing, the crowning (加冠) of a prom king and queen, and just talking to friends. In some cases, high school students collect funds for their class prom through the four years of their high school.
High schools in or near large cities may rent ballrooms at expensive hotels or, to be unusual, on a pleasure cruise boat.
But often costs are cut by simply using the school gym. Students make a lot of effort to decorate the gym to make the event special. The music played at the prom will be the most popular kinds, like rock and hip-hop.
The students elect the Prom Queen. She is partnered with a Prom King who is elected similarly. These are great honors that the pair take very seriously. The two dance with each other to celebrate their election.
Sometimes teachers and parents also go to the prom. But others like to go with friends, to whom they are soon going to be saying goodbye.
If you like the idea of a prom, why don’t you and your classmates organize one for your graduation?Which of the following indicates that prom is very important to students?
| A．They take pictures at the prom. |
| B．They wear formal clothes or special clothes. |
| C．Music is played at the prom. |
| D．Teachers and parents attend it. |
Which of the following is an economical way to hold the prom?
| A．Renting a ballroom. |
| B．Taking a cruise boat. |
| C．Holding it in the school gym. |
| D．Wearing formal dresses. |
Why do some students attend the prom with their friends?
| A．They will part with their friends in a short time. |
| B．They don’t like to be accompanied by their parents. |
| C．They don’t want to depend on their parents. |
| D．They want to be elected by their friends as the Prom King or Queen. |
What is the writer’s purpose to write this passage?
| A．To tell an interesting experience of high school students. |
| B．To tell how the western students spend the last days of high school. |
| C．To introduce several ways of western students’ killing time. |
| D．To tell how western high school students usually celebrate graduation. |
The Calgary Public Library has some great resources to beat boredom and keep your children busy over the summer, whether at home or on the road．
During the school year children are busy with homework and required reading, so summer is a great time for them to relax and read what they choose. Not only is reading a pleasurable way to pass the time, it will also help children keep their skills up over the summer, so they are prepared to go back to school in the fall．
If you are taking a trip this summer, why not let the kids help out with the planning? Borrow a children’s atlas (地图集) to choose your way together and check out some books about your destination before departure. The All about Provinces and Territories series is full of interesting facts about each Canadian province．
Going camping? How about taking along some scary stories to tell around the campfire? Alvin Schwarz’s collections of Scary Tales to Tell in the Dark are sure to make your spine tingle and your teeth chatter. For something a little less horrible, try Velcome: a Very Scary Book, by Kevin O’Malley, which includes such horrors as a plate of mixed vegetables!
Remember to lead by example and pack a book in your own beach bag. If children see you reading, they will understand that books are an important and valuable part of summer and they will begin to copy your habits!
The staff at the Calgary Public Library are always happy to help find that perfect summer read, so stop by your nearest branch, call us at 260-2600, or visit our website at calgarypubliclibrary. com today．What can we infer from the second paragraph of the passage?
| A．Summer is the only time for children to relax themselves． |
| B．Children have little time to read what they choose at school． |
| C．Children usually get bored of reading during the school year. |
| D．Required reading prepares children to go back to school in the fall． |
If you want your children to have a good knowledge of Canada before a trip, youhad better refer to _________.
| A．All about Provinces and Territories |
| B．Scary Tales to Tell in the Dark |
| C．Velcome: a Very Scary Book |
| D．A Children’s Atlas |
What’s the probable meaning of the underlined part “to make your spine tingle andyour teeth chatter” in Paragraph 4?
| A．To interest you and impress you. |
| B．To excite you and frighten you. |
| C．To embarrass you and annoy you. |
| D．To discourage you and disgust you. |
You should take a book with you to _________.
| A．save your own time |
| B．enjoy your summer holiday |
| C．set a good example to your children |
| D．follow your children’s good habits |
Finally, I entered the university. Because of my careful savings, I did not have to work during the school year. Then, summer came and it was time to work harder than ever. I continued working as a waitress at night, instructed tennis camps several mornings a week and worked as a secretary for a few hours in the afternoons. I even decided to take a class at a community (社区) college. This class at the community college saved me $650. It was an extremely tiring summer and made me anxious to return to my relatively easy life at the university.
During my second and third years of undergraduate schooling, I decided to work about five hours per week in the campus (校园) admissions office answering phones. This provided a little spending money and kept me from drawing my savings out. I wanted to go to Israel to study for 3 weeks, but I hesitated in making this decision because it would cost me $1,600 more to get the credits in Israel. About two weeks later my Mom called to tell me that I had $1,600 in the bank that I had forgotten about! One of my concerns about this trip was not only the cost, but the loss of time to make money; however, I made as much that summer in the ten weeks when I was at home as I had made during the fourteen weeks when I was at home the summer before. The way everything worked together to make this trip possible was one of the most exciting things that have ever happened to me.
This experience has shaped me in many important ways. The first thing that I learned was the importance of a strong work ethic (伦理). Working long hours did a lot to develop my character and helped me learn the value of a dollar. It also made me learn how to search for creative ways to settle difficult situations.Where did the writer probably work part-time before attending the university?
| A．In a restaurant. |
| B．In the tennis camps. |
| C．In a company. |
| D．In the admissions office. |
The writer took a class at a community college mainly because _________.
| A．she wanted to save money |
| B．life there was relatively easy |
| C．summer time was tiring |
| D．it was required by the university |
The writer’s major concern about the trip to Israel was that _________.
| A．her mother would not agree |
| B．she would fail to get credits in Israel |
| C．a well-paid summer job would be lost |
| D．$1,600 couldn’t be drawn out in time |
The passage is mainly about how the writer _________.
| A．made money on the college campus |
| B．managed to make full use of her vacation |
| C．was forced to support herself by her mother |
| D．was shaped by working part-time through college |