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Warning: Holding a cell phone against your ear or storing it in your pocket
Warning: Holding a cell phone against your ear or storing it in your pocket
游客
2024-09-22
1
管理
问题
Warning: Holding a cell phone against your ear or storing 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【C1】______ when a new phone is purchased. Apple, 【C2】______, doesn’t want iPhones to come closer to you than 1.5 centimeters; Research In Motion, BlackBerry’s manufacturer,【C3】______2.5 centimeters.
If health issues【C4】______cell phone use, the implications are huge. According to a recent survey,Americans chat【C5】______cell phones 2.26 trillion minutes annually, which【C6】______ $100 billion for the wireless carriers. Epidemiologists(流行病学家)pointed out that brain cancer is a( n) 【C7】______. Overall, there has not been a(n) 【C8】______ in its incidence since cell phones arrived. But the average【C9】______an increase in brain cancer in the 20-to-29 age group【C10】______a drop for the older population.
"Most cancers have【C11】______causes," an expert says,【C12】______she points to laboratory research that suggests low-energy radiation could damage cells that could possibly lead to cancer.
Besides, children are more【C13】______ to radiation than adults, other scientists point out. Radiation that【C14】______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【C15】______ more absorptive fluid.
Henry Lai ,a research professor at the University of Washington,began laboratory radiation studies in 1980 and found that rats【C16】______ radio frequency radiation had【C17】______DNA in their brains.
Ms. Davis recommends【C18】______wired headsets or the phone’s speaker. Children should text【C19】______ call, she said, and pregnant women should keep phones away from the abdomen【C20】______. [br] 【C8】
选项
A、raise
B、decrease
C、add
D、rise
答案
D
解析
名词辨析题。根据后面的but判断,此处前后是转折关系,后面句子中有个increase,因此前面说的应该是没有增长,所以这里应该是表示增长意思的单词。[D]rise作名词时,表示“增长,上升”,符合文意,故为正确答案。[A]raise作为名词,表示“加薪”,不符合文意,故排除;[B]decrease作名词时,意为“下降”,不符合此处的逻辑关系,故排除;[C]add作名词时意为“加法”,作动词时,才表示“增加”。故排除。
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