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Cell Phones Increase Traffic, Pedestrian Fatalities

Cell phones are a danger on the road in more ways than one. Two new studies show that talking on the phone while traveling, whether you’re driving or on foot is increasing both pedestrian deaths and those of drivers and passengers, and recommend crackdowns on cell use by both pedestrians and drivers.
The new studies, lead-authored by Rutgers University, Newark, Economics Professor Peter D Loeb, relate the impact of cell phones on accident fatalities to the number of cell phones in use, showing that the current increase in deaths resulting from cell phone use follows a period when cell phones actually helped to reduce pedestrian and traffic fatalities. However, this reduction in fatalities disappeared once the numbers of phones in use reached a "critical mass" of 100 million, the study found.
These studies looked at cell phone use and motor vehicle accidents from 1975 through 20
A. show that talking on the phone while driving or walking in the street increases deaths of drivers and pedestrians
B. show that talking on the phone while driving increases pedestrian deaths
C. recommend that strict measures be taken to restrain cell phone use
D. both A and C

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Cell Phones Increase Traffic, Pedestrian Fatalities

Cell phones are a danger on the road in more ways than one. Two new studies show that talking on the phone while traveling, whether you’re driving or on foot is increasing both pedestrian deaths and those of drivers and passengers, and recommend crackdowns on cell use by both pedestrians and drivers.
The new studies, lead-authored by Rutgers University, Newark, Economics Professor Peter D Loeb, relate the impact of cell phones on accident fatalities to the number of cell phones in use, showing that the current increase in deaths resulting from cell phone use follows a period when cell phones actually helped to reduce pedestrian and traffic fatalities. However, this reduction in fatalities disappeared once the numbers of phones in use reached a "critical mass" of 100 million, the study found.
These studies looked at cell phone use and motor vehicle accidents from 1975 through 20
A. Right after cell phones were invented.
B. Before the number of cell phone users reached a critical mass
C. When cell phone users totaled to a certain number.
D. When the number of cell phones decreased to a certain number.

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[单项选择]In order to increase revenues, a cell-phone company has decided to change its fee structure. Instead of charging a flat rate of $20 per month and $0.05 for every minute over 200 minutes, the company will now charge $50 per month for unlimited usage. Which of the following is a consideration that, if true, suggests that the new plan will not actually increase the company’s revenues ？（）
A. A rival company, which charges no start-up fee, offers an unlimited calling plan for $40 per month.
B. Two-thirds of the company’s customers use less than 500 minutes per month.
C. Studies have shown that customers using unlimited calling plans will increase their monthly usage of minutes by over 50 percent.
D. One-fifth of the company’s customers use in excess of 1,000 minutes per month.
E. In recent months the company has received several complaints of insufficient signal strength and poor customer service.

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The safety of mobile phones (U. S. cell-phones) seems to face new questions after British researchers found that microwave emissions can affect the health of earthworms in unexplained ways.
The larvae of tiny soil worms called nematodes grew faster and became more (1) after they were (2) for a long time to weak microwave radiation, of the (3) strength and frequency as that (4) by mobile phones, they found.
Why this occurred is (5) , and there is no evidence that human health is also affected. But, they warn, the finding challenges the standards which (6) whether a mobile is safe or not.
These standards are based on whether the radiation is strong enough to cause a batch of (7) to warm up. Heat causes the chemical bonds in cells to (8) , a disruption that can be a potential (9) for cancer.
The research, led by David de Pomerai at Nottingham University, central England, s
A. adequate
B. fertile
C. ample
D. multiple

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