2021年12月大学英语四级考试模拟题阅读部分

xx年12月大学英语四级考试模拟题阅读部分Directions:There are4passages inthis part.Each passageis followedby somequestions orunfinished statements.For eachof themthere arefour choicesmarked A,B,C andD.You shoulddecide on the bestchoice andmark thecorresponding letteron cet4v.with asingle linethrough thecenter.Passage OneQuestions1to5are basedonthefollowing passage.Design ofall thenew toolsand implementsis basedon carefulexperiments withelectronic instruments.First,a human“guinea pig”is testedusing aregular tool.Measurements aretaken of the amountof workdone,and thebuildup ofheat inthe body.Twisted jointsand stretchedmuscles cannot performas well,it hasbeen found,as jointsand musclesin theirnormal positions.The sameperson isthen testedagain,using atool designedaording tothe suggestionsmade byDr.Tichauer.All thesetests haveshown thegreat improvementofthenew designsover theold.One ofthe electronicinstruments use...。