题目内容
Holding a cell phone against your ear or storing it in your pocket may be dangerous to your health. This explains a warning that cell phone manufacturers include in the small print that is often ignored when a new phone is purchased. Apple, for example, doesn’t want iPhones 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 possible effects are huge. Voice calls - Americans chat on cell phones 2.26 trillion(万亿)minutes annually - earn $109 billion for the wireless carriers.
Devra Davis, an expert 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(易受伤的)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(易吸收的液体). 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 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(腹部).
66. Why is the warning in the small print?
A. They don’t want the users to pay attention to it.
B. There is not enough space for the warning.
C. They think people will not care about it.
D. The warning is not important at all.
67. According to Ms Davis, brain cancer increase .
A. among children B. among old people
C. in the twenties D. among pregnant women
68. Why do children easily be affected by radiation?
A. Because they haven’t grown up.
B. Because they are too young to protect themselves.
C. Because they use cell phones more often than adults.
D. Because their skulls are thinner and their brains are easily hurt.
69. What can we conclude from the last paragraph?
A. Pregnant women should keep cell phones away.
B. People should use cell phones in the correct way.
C. If you are a child, you’d better text than make phone calls.
D. When you use a cell phone, use a wired headset or the phone’s speaker.
70. What does the passage mainly talk about?
A. Be careful when using cell phones.
B. Don’t hold your cell phone against your ear.
C. Rats exposed to radiation have damaged DNA in their brains.
D. Low-energy radiation could damage cells that could lead to cancer.
ACDBA
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 |