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Warning: Holding a cell phone against your ear or storing it in your pocket may be hazardous to your health. This paraphrase
Warning: Holding a cell phone against your ear or storing it in your pocket may be hazardous to your health. This paraphrase
admin
2013-10-11
47
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 (1)______when a new phone is purchased. Apple,(2)______, doesn’t want IPhones to come closer to you than 1. 5 centimeters; Research In Motion, BlackBerry’s manufacturer,(3)______2.5 centimeters.
If health issues(4)______ cell phone use, the implications are huge. According to a recent survey, Americans chat(5)______ cell phones 2. 26 trillion minutes annually, which(6)______$109 billion for the wireless carriers. Epide-miologists(流行病学家)pointed out that brain cancer isa(n)(7)______. Overall, there has not been a(n)(8)______in its incidence since cell phones arrived. But the average(9)______ an increase in brain cancer in the 20-to-29 age group(10)______a drop for the older population.
"Most cancers have(11)______ causes," an expert says, (12)______she points to laboratory research that suggests low-energy radiation could damage cells that could possibly lead to cancer.
Besides, children are more (13)______ to radiation than adults, other scientists point out. Radiation that(14)______ 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(15)______more absorptive fluid.
Henry Lai, a research professor at the University of Washington, began laboratory radiation studies in 1980 and found that rats(16)______ radio frequency radiation had(17) ______DNA in their brains.
Ms. Davis recommends(18)______ wired headsets or the phone’s speaker. Children should text (19)______ call, she said, and pregnant women should keep phones away from the abdomen(20)______.
(10)
选项
A、when
B、though
C、while
D、however
答案
C
解析
语篇衔接题。根据后面的单词drop可以判断,前后两个分句应该是转折关系,因此答案为[C]while,意为“然而,相反的是”。[A]when表示“与此同时”,与本句的逻辑关系不符;[B]though是一个从属连词,表示“虽然”,应该用来引导前面那个分句;[D]however是副词,不能放在两个句子之间进行连接,故上述三项均可排除。
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0
专业英语四级
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