Europe’s deadly outbreak of a rare form of E. coli bacteria (大肠杆菌) has brought new attention to food safety issues. One of the problems when people get sick from food is that the simplest question is often difficult or even impossible to answer. Just what did the people eat that made them sick?
Of course, one way to avoid these medical mysteries is to keep dangerous organisms out of the food supply. This is easier said than done, but scientists keep looking for new ways.
Scientists in the United States have developed an experimental system that uses a high-tech optical scanner. The system is designed to identify the presence of contaminants(致污物) like soil or animal waste on fresh produce. These can be sources of E. coli. E. coli bacteria naturally live in the intestines(肠) of humans and many animals. Most kinds of E. coli are harmless but some can make people sick.
The new scanner can also show damage and imperfections that might make the produce unappealing to shoppers.
Scientists designed the system at a Department of Agriculture research center in Beltsville, Maryland. Moon Kim of the Agricultural Research Service led the team.
MOON KIM: “We were requested, we were asked, to develop a method to detect contamination in produce. So we started with the apple as the model sample.”
The scanner uses a high-speed camera placed over the conveyer belt that moves the produce along. As the apples move along the belt, the scanner captures images of each piece of fruit.
Moon Kim says the team hopes the system will be available before long.
MOON KIM: “We are targeting for development in commercial plants for the next several years.”
The scanner can direct a sorting machine to separate the bad apples from the good ones. The system is currently able to show the surface of only half the apple as it speeds by. The inventers hope to improve the process so it can show the whole surface.What is the main topic of the text?
| A．Bacteria. | B．A high-tech scanner. |
| C．A camera | D．Food safety. |
E. coli bacteria ______.
| A．broke out all over the world | B．comes from soil or animal waste |
| C．is extremely harmful to health | D．does not cause illness |
The high-tech scanner ______.
| A．can help to sort out different fruits |
| B．make the produce appeal to shoppers |
| C．can only capture images of the whole apple |
| D．can identify the presence of contaminants |
What can be inferred from the text?
| A．The scanner needs to be improved. |
| B．The scanner will be available in the next several years. |
| C．Moon Kim is unwilling to develop the scanner. |
| D．The scanner is connected to a sorting machine. |
If Jack, a 12-year-old, is interested in adventure, what film may he see alone?
| A．Film directed by Gary Rydstrom |
| B．Film directed by Ken Kwapis. |
| C．Film directed by Tyler Perry. |
| D．Films directed by Brad Peyton. |
What does the underlined phrase "down-on-her-luck" in Film Three mean?
| A．wealthy | B．unlucky |
| C．stubborn | D．selfish |
In Film Four, we can infer that.
| A．audiences can also enjoy its 3D edition freely |
| B．adventurer Sean is also a Greenpeace volunteer |
| C．the kids may find it hard to catch its language |
| D．Sean makes a fortune by discovering the treasure |
What can we learn from the passage?
| A．Film Three lasts longest and release earliest of the films, |
| B．Wesley Deeds fell in love with Lindsey at first sight. |
| C．Film Two is mainly a film meant for adults only. |
| D．Shawn develops a secret friendship with Arrietty. |
Each spring brings a new blossom of wildflowers in the ditches(沟渠)along the highway I travel daily to work.
There is one particular blue flower that has always caught my eye. I've noticed that it blooms only in the morning hours; the afternoon sun is too warm for it. Every day for approximately two weeks, I see those beautiful
flowers.
This spring, I started a wildflower garden in our yard. I can look out of the kitchen window while doing the dishes and see the flowers. I've often thought that those lovely blue flowers from the ditch would look great in that bed alongside other wildflowers. Every day I drove past the flowers thinking, "I'II stop on my way home and dig them." "Gee, I don't want to get my good clothes dirty.,." Whatever the reason, I never stopped to dig them. My husband even gave me a folding tool one year for my trunk to be used for that expressed purpose.
One day on my way home from work, I was upset to see that the highway department had removed the ditches
and the pretty blue flowers were gone. I thought to myself, "Way to go, you waited too long. You should have done
it when you first saw them blooming this spring."
A week ago we were shocked and sad to learn that my oldest sister-in-law has a serious brain disease. She is20 years older than my husband and unfortunately, because of age and distance, we haven't been as close as we all would have liked. I couldn't help but see the connection between the pretty blue flowers and the relationship between my husband's sister and us. I do believe that God has given us some time left to plant some wonderful
memories that will bloom every year for us.
And yes, if I see the blue flowers again, you can bet I'll stop and transplant them to my wildflower garden.
Why does the writer want to start a wildflower garden in her yard?
| A．Because the flowers bloom only in the morning hours. |
| B．Because she can see the flowers every day for two weeks. |
| C．Because the flowers can remind her of her oldest sister-in-law. |
| D．Because she enjoys the way of life in company with the flowers. |
Which statement is NOT true according to the passage?
| A．The blue flowers in the ditches always draw my attention. |
| B．We don't get on well with the sister-in-law in practice. |
| C．I never stopped to dig the flowers for some reason. |
| D．The sister-in-law lives far from us. |
According to the passage, the writer will .
| A．stop to find the flowers whenever she drives along the highway |
| B．plant a variety of flowers in the garden in her yard in future |
| C．get as wonderful memories with the sister-in-law as before |
| D．get more close to the sister-in-law in the following days |
What is the theme of the story?
| A．Actions speak louder than words. |
| B．No sweets without sweat. |
| C．Time and tide wait for no man. |
| D．Opportunity belongs to whoever is prepared. |
Welcome to your future life!
You get up in the morning and look into the mirror. Your face is firm and young-looking. In 2035, medical technology is better than ever. Many people your age could live to be 150,so at 40, you’re not old at all. And your parents just had an anti-aging(抗衰老的) treatment. Now, all three of you look the same age !
You say to your shirt , “Turn red.” It changes from blue to red. In 2035, “smart clothes” contain particles(粒子) much smaller than the cells in your body. The particles can be programmed to change clothes’color or pattern.
You walk into the kitchen . You pick up the milk ,but a voice says , “ You shouldn't drink that!” Your fridge has read the chip (芯片) that contains information about the milk , and it knows the milk is old . In 2035, every article of food in the grocery store has such a chip .
It’s time to go to work . In 2035, cars drive themselves. Just tell your “smart car” where to go. On the way , you can call a friend using your jacket sleeve . Such “smart technology” is all around you.
So will all these things come true? “For new technology to succeed,” says scientist Andrew Zolli , “it has to be so much better that it replaces what we have already.” The Internet is one example --- what will be the next?
We can learn from the text that in the future__________.
| A．people will never get old |
| B．everyone will look the same |
| C．red will be the most popular color |
| D．clothes will be able to change their pattern |
What can be inferred from Paragraph 4?
| A．Milk will be harmful to health. |
| B．More drinks will be available for sale. |
| C．Milk in the grocery store will stay fresh much longer. |
| D．Food in the grocery store will carry electronic information. |
Which of the following is mentioned in the text?
| A．Fridges will know what people need. |
| B．Jacket sleeves can be used as a guide. |
| C．Cars will be able to drive automatically. |
| D．Nothing can replace the Internet. |
What is the text mainly about?
| A．Future technology in everyday life. |
| B．Food and clothing in 2035. |
| C．Medical treatments of the future. |
| D．The reason for the success of new technology. |
Getting rid of dirt, in the opinion of most people, is a good thing. However, there is nothing fixed about attitudes to dirt.
In the early 16th century, people thought that dirt on the skin was a means to block out disease, as medical opinion had it that washing off dirt with hot water could open up the skin and let ills in. A particular danger was thought to lie in public baths. By 1538, the French king had closed the bath houses in his kingdom. So did the king of England in 1546. Thus began a long time when the rich and the poor in Europe lived with dirt in a friendly way. Henry IV, King of France, was famously dirty. Upon learning that a nobleman had taken a bath, the king ordered that, to avoid the attack of disease, the nobleman should not go out.
Though the belief in the merit of dirt was long-lived, dirt has no longer been regarded as a nice neighbor ever since the 18th century. Scientifically speaking, cleaning away dirt is good to health. Clean water supply and hand washing are practical means of preventing disease. Yet, it seems that standards of cleanliness have moved beyond science since World War Ⅱ. Advertisements repeatedly sell the idea: clothes need to be whiter than white, cloths ever softer, surfaces to shine. Has the hate for dirt, however, gone too far?
Attitudes to dirt still differ hugely nowadays. Many first-time parents nervously try to warn their children off touching dirt, which might be responsible for the spread of disease.On the contrary, Mary Ruebush, an American immunologist(免疫学家)，encourages children to play in the dirt to build up a strong immune system. And the latter position is gaining some ground.
The kings of France and England in the 16th century closed bath houses because .
| A．they lived healthily in a dirty environment. |
| B．they believed disease could be spread in public baths |
| C．they thought bath houses were too dirty to stay in |
| D．they considered bathing as the cause of skin disease |
Which of the following best describes Henry IV’s attitude to bathing?
| A．Approving. | B．Afraid.. |
| C．Curious | D．Uninterested. |
How does the passage mainly develop?
| A．By providing examples. |
| B．By making comparisons. |
| C．By following the order of time. |
| D．By following the order of importance. |
What is the author’s purpose in writing the passage?
| A．To stress the role of dirt. |
| B．To introduce the history of dirt. |
| C．To call attention to the danger of dirt. |
| D．To present the change of views on dirt. |
BEIJING - A research team led by Chinese scientists have discovered dietary modulation of gut microbiota（膳食干预肠道菌群）can alleviate both genetic and simple obesity in children.
The findings of the team, led by Zhao Liping with Shanghai Jiaotong University, Yin Aihua with the Guangdong province children's hospital, and Tang Huiru with Chinese Academy of Sciences, have been published on EBioMedicine, a renowned medical journal co-sponsored by Cell and The Lancet in July.
The team identified bacterial genomes specifically for producing obesity-related metabolites（代谢物）, and said an improved gut microbiota can significantly help to treat genetic obesity such as Prader-Willi Syndrome (PWS).
Beginning in childhood, PWS affected kids develop an insatiable appetite, leading to chronic overeating and obesity.
The scientists used a diet therapy with beneficial gut bacteria on trial patients and found considerable diminished appetite, weight loss and improved health conditions on the patients.
The paper concluded dysbiosis（失调）of gut microbiota is highly related with both genetic and simple obesity in children, implicating dietary modulation of gut microbiota a potentially effective treatment method.
Which of the following factors contributes to child obesity ?
| A．dietary modulation of gut microbiota |
| B．beneficial gut bacteria |
| C．an improved gut microbiota |
| D．dysbiosis of gut microbiota |
Which can replace the underlined word “diminished”？
| A．unsatisfied | B．increased |
| C．decreased | D．good |
Where is the passage extracted?
| A．Medicine book | B．Science book |
| C．Doctor’s instructions | D．News report |
Which might be the best title for the passage?
| A．Chinese scientists discover treatment to child obesity. |
| B．The reasons for genetic obesity in children has been found. |
| C．Obesity-related research has been done by Chinese scientists. |
| D．An effective treatment to obesity has been found. |
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