微機中1MB表示的二進制位數是()。
A、1024×1024×8A
暫無解析
Passage3
Questions11to15arebasedonthefollowingpassage:
About70millionAmericansaretryingtolossweight.Thatisalmost1outofevery3peopleintheUnitedStates.Somepeoplegoonideas.Thismeanstheyeatlesscertainfoods,especiallyfatsandsugars.Otherpeopleexercisewithespecialequipment,takedietpills,orevenhavesurgery.Losingweightishardwork,anditcanalsocostalotofmoney.SowhydosomanypeopleintheUnitedStateswanttoloseweight?
ManypeopleintheUnitedStatesworryaboutnotlookingyoungandattractive.Formanypeople,lookinggoodalsomeansbeingthin.Otherpeopleworryabouttheirhealth.Manydoctorssaybeingoverweightisnothealthy.ButareAmericansreallyfat?Almost30millionAmericansweightatleast20percentmorethantheiridealweight.Infact,theUnitedStateisthemostoverweightcountryinthewild.“ThestoredfatofadultAmericansweight2.3trillionpounds,”saysUniversityofMassachusettsanthropologist(人類學家)GeorgeArmelagos.Hesaysburningoffthatstoredenergywouldproduceenoughpowerfor900,000carstogo12,000miles.
Losingweightishardwork,butmostpeoplewanttofindafastandeasywaytotakeofffat.Bookstoresselllotsofdietbooks.Thesebookstellreadershowtoloseweight.Eachyear,dozensofnewbookslikethesearewritten.Eachoneboaststohelppeopletogetridoffat.
11.WhichofthefollowingisNOTmentionedasawayoflosingweight?
A.Toeatlessfatsandsugars.B.Toworkhard.
12.ManyAmericansaretryingtoloseweightbecause.
A.theywanttolookattractiveB.theyaremisledbydoctors
C.theywanttokeepfitD.bothAandC
13.Thefiguresgiveninthesecondparagraphsuggestthat.
A.AmericansaredependentoncarsB.carsconsumealotofmoney
C.AmericansneedloseweightD.excessoffatcanbeasourceofenergy
14.Itcanbeinferredfromthelastparagraphthat.
A.dietbooksarenotalwayseffectiveB.dietbooksareusuallyhelpful
C.therearelotsofwaysoflosingweightD.bookstoresarekeepingtheirpromises
15.Itcanbeconcludedfromthepassagethat.
A.peoplethinktoomuchoftheirappearance
B.thereisnotasurewayoflosingweightasyet
C.surgeryisthefastestwayoflosingweight
D.goingondietisasafewayoflosingweight
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