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doubtful that doctors can get accurate measurements. A new head-mounted device that
measures eye movements rather than blood flow and allows patients to move around
will undoubtedly provide better brain measurements. Thus, the new head-mounted
device should replace the older device at all hospitals and research institutions.
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85) The following appeared in a health newsletter.
"According to a recent study, people with many social ties report catching colds less
often than do people with few social ties. Consequently, researchers conclude that
having an active social life probably helps strengthen the immune system. The
researchers note that catching a cold—one of a family of highly contagious viruses—
gives the cold-sufferer temporary immunity to that virus in the future, but not to the
many other related viruses. Merely being exposed to a new cold virus, however, is not
enough for a person to catch a cold, since a strong immune system can successfully fight
off some new viruses. Thus, in order to prevent catching a cold, people should
strengthen their immune systems by becoming more active socially."
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86) The following editorial appeared in a newspaper in the country of Solaria.
"The Eliot Valley region was primarily agricultural twenty years ago. In the past twenty
years, however, many computer-chip manufacturers have opened factories there. A
recent study found that water pollution in the region was worse than in any other region
in the country. Moreover, the computer-chip factories, which use large quantities of
water to manufacture the chips, are probably responsible for the low levels of water in
the region's lakes and reservoirs. Therefore, if the region's computer-chip makers had
limits placed on the amount of water they could use, water quality would improve."
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87) The following appeared in an editorial in the Seatown newspaper.
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