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大学英语四级选词填空模拟题VIP免费

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第一篇关于减肥PerhapslikemostAmericansyouhavesomeextrapoundsto47.Youmayevenhavetriedafaddietortwo,butfoundyourselfrightbackwhereyoustarted.Thekeytoweightlossisregular48activity.Andsurprisingly,youdon'thavetogiveupeatingormakethegymyoursecondhometoseelong-term,49effects.Youbodyneedsacertainamountofenergytomaintainbasic50suchasbreathing,bloodcirculationanddigestion.Theenergyrequiredtokeepyourorgansfunctioningisreferredtoastherestingorbasalmetabolicrate.Anytimeyouareactive,51energyisrequired.Itisobtainedfromglycogenandfatstoredintheblood,liver,andmuscles.Thekeytolosingweightistodrawonthefatratherthanonthecarbohydratereserves.Whichofthetwoenergysourcesyouusedependsontheintensityand52ofyouractivity.Thehighertheintensity,themoreyourbodywillpullfromthestoredcarbohydrates.Thelowertheintensity,themoreyourbodywill53onfatasitsfuel.Aerobicexerciseismost54forweightloss.Whenyouperformaerobicactivitiesyou55contractlargemusclegroupssuchasyourlegsandarms.Walking,running,rollerblading,swimming,dancing,andjumpingjacksareallformsofaerobicactivity.Surprisingly,ifyouraerobicactivityislowtomoderatelyintenseandoflongduration,youwillburnmorefatthanifyouhad56inashortburstofhigh-intensityexercise.Inshort,abrisk30-minutewalkwillburnfatwhilea100-yardsprintwillburnglycogen.[A]positive[B]additional[C]duration[D]effective[E]shed[F]physical[G]food[H]functions[I]participated[J]rely[K]cut[L]repeatedly[M]uses[N]little[O]obvious47.E该空需填入动词原形,结合原意“和大多数美国人一梯状,你(的体重)可能也有几磅需要________”可知,E(去除)最符合文意。48.F结合常识和下文可知,F最符合文意。49.A结合句意“令人惊奇的是,为了看到长期________效果你不必节食或常去健身馆”,可知空格处需填一形容词,初选后留下A、D。由于下文只是讲到运动会帮助减肥,但并未说明它的效果明显,所以此处宜选用意思上更宽泛的positive(正面的,有效的)。50.H下文举例的breathing,bloodcirculationanddigestion都是人体的基本功能,且其后的functioning已给出了提示,故H最符合文意。51.B该空需填入形容词,结合常识和句意“任何时候只要你活动,你都需要________能量”来看选项,B(额外的)符合文意。52.C该句句意为“采用这两种能量消耗来源中的哪一种取决于你活动的强度和________”,结合下文提到的...lowtomoderatelyintenseandoflongduration...可知C最符合文意。53.J结合句意“(活动的)强度越低,身体越________于脂肪作为其燃料”,该空应填入能和on搭配的动词,J最符合文意。54.D结合常识可知,有氧运动是最有效的减肥方式,选项中D最符合文意。55.L该空需填入副词,选项中只有L和N可作副词,由下文提到的walking,running,swimming,dancing,andjumping等可推知在这些有氧运动中四肢的活动是反复的,故排除N。56.I该空需填入动词的过去分词,结合句意“如果你已经________高强度、爆发性的运动,你会燃烧更多的脂肪”可知I最符合文意。第二篇关于太阳花Asunflowerisasunflower.Amobilephoneisamobilephone.Butcanyou47thetwotodosomethingforyourlocal48?Itmaywellbepossible.Whenyouhavefinishedwithyourmobilephoneyouwillbeableto49itinthegardenoraplantpotandwaitforittoflower.50,abiodegradable(生物可降解的)mobilephonewasintroducedbyscientists.Itishopedthatthenewtypeofphonewillencourage51torecycle.Scientistshavecomeupwithanewmaterialoverthelastfiveyears.Itlookslikeanyother52andcanbehardorsoft.andabletochangeshape.Overtimeitcanalsobreakdownintothesoilwithoutgivingoutanytoxic53.Britishresearchersusedthenewmaterialtodevelopaphonecoverthatcontainsasunflowerseed.Whenthisnewtypeofcoverturnsintowaste,it54nitrates(硝酸盐).Thesefeedtheseedandhelptheflow...

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