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(人类学家)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

Everyone____therighttohisownopinion.

下列哪个现象不属于临产诊断依据

妊娠妇女睡眠时应多取

产后出血最常见的原因为( )。