题目内容
Holding a cell phone against your ear or stalling it in your pocket may be hazardous to your health.
This paraphrases a warning that cell phone; manufacturers include in the small print that is often tossed aside when a new phone is purchased.Apple, for example, doesn't want iP hones to come closer to you than 1.5 centimeters; Research In Motion, Blackberry's manufacturer, recommends 2.5 centimeters.
If health issues arise from cell phone use, the implications are huge.Voice calls - Americans chat on cell phones 2.26 trillion minutes annually - generate $109 billion for the wireless carriers.
Devra Davis, an epidemiologist who has worked for the University of Pittsburgh, has published a book about cell phone radiation, "Disconnect." The book surveys scientific research and concludes the question is not settled.
Brain cancer is a concern that Ms. Davis examines. Over all, there has not been an increase in its incidence since cell phones arrived. But the average masks an increase in brain cancer in the 20-to-29 age group and a drop for the older population.
"Most cancers have multiple causes," she says, but she points to laboratory research that suggests low-energy radiation could damage cells that could possibly lead to cancer.
Children are more vulnerable to radiation than adults, Ms. Davis and other scientists point out. Radiation that penetrates only five centimeters into the brain of an adult will reach much deeper into the brains of children because their skulls are thinner and their brains contain more absorptive fluid. No studies have yet been completed on cell phone radiation and children, she says.
Henry Lai, a research professor in the bioengineering department at the University of Washington, began laboratory radiation studies in 1980 and found that rats exposed to radiofrequency radiation had damaged DNA in their brains.
Ms. Davis recommends using wired headsets or the phone's speaker. Children should text rather than call, she said, and pregnant women should keep phones away from the abdomen.
1.We can infer from the passage that________.
A.Cell phone may do harm to our health if we hold it against our ear or store in our pocket
B.Devra Davis thinks that there are many factors contributing to cancer.
C.The increase in brain cancer in the young adults may have something to do with cell phone
D.Children are more likely to be affected by radiation
2.According to the passage, how could children avoid being hurt by cell phone radiation?
A.They can keep cell phones away from the abdomen.
B.They can send short massage instead of making phone calls directly.
C.They can pay more attention to the small print on the phone.
D.They should use more advanced cell phones.
3.From this passage we can learn that.________.
A.American cell phone manufacturers did not give any warning to their customers
B.American cell phone manufacturers benefit greatly from their products
C.Scientists have found the connection between brain cancer and ceil phone
D.Cell phone should be banned because of the increase in brain cancer
4.In which column can we most probably read this passage?
A.Advanced technology. B.Entertainment.
C.Science and life. D.Celebrity.
1.C
2.B
3.B
4.C
【解析】略
Ever thought you’d get to experience the smell of ancient Egyptian queen Cleopatra’s hair, or the scent(气味) of the sun? Visitors to the Reg Vardy Gallery will soon be able to do just that.
The gallery, at Sunderland University, England, is holding a new exhibition “If There Ever Was”. It focuses on scent rather than sight.
The innovative(创新的) idea is the brainchild of curator(馆长) Robert Blackson. His inspiration came from reading the book Fast Food Nation. The book discussed the use of artificial chemicals to flavor things such as milkshakes, making them smell and taste like strawberries, when they’re not actually made from them.
A smell can often conjure up(召唤) memories such as school dinners or a childhood holiday by the sea, but the smells on display, will allow visitors to experience smells their noses won’t have been able to pick out before.
“There’s a whole variety of different smells, including some extinct flowers,” explains Blackson. “Some have been gone for hundreds of years.”
One extraordinary fragrance(香气) is the aftermath(灾难的后果) of the first atomic bomb, dropped on Japan on August 6,1945.
There is also the smell of Clepatra’s hair, based on incense(熏香) that was popular among ancient Egyptians.
The Soviet Mir space station, which burnt up in the atmosphere in 2001, smells of charred(烧焦的) material (the space station caught fire).
Among the stranger smells is the “surface of the sun”.
“It is hard to sum up. It is an atmospheric smell, like walking into a room when the sun has been pouring in” says Blackson. “It gives a freshness, a sun kissed feel with a bit of metal. If you can say something smells hot, this is it.”
A team of 11, including perfume designers, have been working on recreating the smells for the exhibition. James Wong, a botanist(植物学家)at Botanic Gardens Conservation International, UK, helped in the recreation of the smells of four extinct flowering plants.
He did this by closely linking the extinct flowers with the smells of existing ones. With the help of historical reports of how the extinct flowers smelled, he was able to remix the aromas(芳香).
The exhibition runs until June 6.Fourteen extinct and impossible smells are on display.
【小题1】What might be the best title of the passage?
A.The Reg Vardy Gallery | B.Egyptian queen Cleopatra’s hair |
C.A visit to a new exhibition | D.The scents of ancient Egypt |
A.the scent of ancient Egyptian queen Cleopatra’s hair |
B.the smells of charred material of the Soviet Mir space station |
C.the scent of having a childhood vacation by the sea |
D.the smell of the aftermath of the first atomic bomb dropped on Japan |
A.Visitors go to Reg Vardy Gallery to enjoy beautiful sights. |
B.James Wong managed to remix the aromas by referring to some historical reports. |
C.The exhibition will last until July 6. |
D.The scents visitors will smell are found in the tomb (坟墓) of the ancient Egyptian queen Cleopatra. |
A.Science | B.Education | C.Entertainment | D.Economy |