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1、BoldFacePractice1.Modern navigation systems, which are found in most of today’s commercial aircraft, are made with low-power circuitry, which is more susceptible to interference than the vacuum-tube circuitry found in older planes.(Fact)During landing, navigation systems receive radio signals fro
2、m the airport to guide the plane to the runway. (Principle)Recently, one plane with low-power circuitry veered off course during landing, its dials dimming, when a passenger turned on a laptop computer.(Evidence) Clearly, modern aircraft navigation systems are being put at risk by the electronic
3、devices that passengers carry on board, such as cassette players and laptop computers.(Conclusion)2.A double-blind study, in which neither the patient nor the primary researcher knows whether the patient is being given the drug being tested or a placebo, is the most effective procedure for testin
4、g the efficacy of a drug.(Principle) But we will not be able to perform such a study on this new drug, since the drug will have various effects on the patients’ bodies, which will make us aware of whether the patients are getting the drug or a placebo.(Anti-Consideration)3.The interstitial nucleu
5、s, a sub-region of the brain’s hypothalamus, is typically smaller for male cats than for female cats.(Fact)A neurobiologist performed autopsies on male cats who died from disease X, a disease affecting no more than 0.5 percent of male cats, and found that these male cats had interstitial nuclei t
6、hat were as large as those generally found in female cats.(Evidence)Thus, the size of the interstitial nucleus determines whether or not male cats can contract disease X,(Considerationthatcanbedrawnfromthefirstone) but, the hypothalamus is known not to be causally linked to disease Y, and disease
7、 X is asubtype of disease Y.(Fact)4.More and more computer programs that provide solutions to mathematical problems in engineering are being produced, and it is thus increasingly unnecessary for practicing engineers to
