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华普教育 2023全国名校高考模拟信息卷 老高考(二)2英语试卷答案

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CResearchers out of Australia's Flinders University recently studied various physical reactions during sleepwhen exposed to noise. They found that certain levels of noise while sleeping, even those below recommendedsafe levels, may affect a person's cardiovascular (心血管的) response. When slowly activated during sleep,these responses “could potentially have adverse effects on the cardiovascular system, ” said researchers.Researchers exposed 20 adult participants to various decibels (分贝) of wind farm and road noise whileasleep, and then monitored physical responses including blood flow and heart rates as well as sleep awakenings.Although asleep, participants reacted to these noises, as found by the researchers.For example, a 48-decibel (dB) noise, which is quieter than the 50-dB hum of a refrigerator, was 3.4 timesmore likely to cause a change in participants' pulse wave amplitude (脉搏波振幅) , which is a measurementthat relates to blood flow. Participants'heart rates responded to the noise as well. After being exposed to anoise of over 40 dB, they experienced an increase followed by a decrease in their heart rates. The study notedthat these sound levels are under the recommended 70 dB limit by the World Health Organization.Physiological reactions that the study monitored, such as heart rates and blood flow, may root in the

17.In which part of the newspaper can we probably find the passage?A.Culture. B.Entertainment.C.Science. D.Business.