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2020英魔新增雅思押题测试卷:阅读1
READING?PASSAGE?3
You?should?spend?about?20?minutes?on?Questions?27-40,?which?are?based?onReading?Passage?3?below.
Stealth?Forces?in?Weight?Loss
The?field?of?weight?loss?is?like?the?ancient?fable?about?the?blind?men?and?the?elephant.?Each?man?investigates?a?different?part?of?the?animal?and?reports?back,?only?to?discover?their?findings?are?bafflingly?incompatible.
A?
The?various?findings?by?public-health?experts,?physicians,?psychologists,?geneticists,?molecular?biologists,?and?nutritionists?are?about?as?similar?as?an?elephants?tusk?is?to?its?tail.?Some?say?obesity?islargely?predetermined?by?our?genes?and?biology;others?attribute?it?to?an?overabundance?of?fries,?soda,and?screen-sucking;?still?others?think?were?fat?because?of?viral?infection,?insulin,?or?the?metabolicconditions?we?encountered?in?the?womb.?Everyone?subscribes?to?their?own?little?theory,?says?RobertBerkowitz,?medical?director?of?the?Center?for?Weight?and?Eating?Disorders?at?the?University?of?Pennsylvania?School?of?Medicine.?Were?programmed?to?hang?onto?the?fat?we?have,?and?some?people?arepredisposed?to?create?and?carry?more?fat?than?others.?Diet?and?exercise?help,?but?in?the?end?the?solutionwill?inevitably?be?more?complicated?than?pushing?away?the?plate?and?going?for?a?walk.?Its?not?assimple?as?Youre?fat?because?youre?lazy,?says?Nikhil?Dhurandhar,?an?associate?professor?at?Pennington?Biomedical?Research?Center?in?Baton?Rouge.?Willpower?is?not?a?prerogative?of?thin?people.Its?distributed?equally.
B??
Science?may?still?be?years?away?from?giving?us?a?miracle?formula?for?fatloss.?Hormone?leptin?is?a?crucial?1?player?in?the?brains?weight-management?circuitry,?Some?people?produce?too?little?leptin;?others?becomedesensitised?to?it.?And?when?obese?people?lose?weight,?their?leptin?levels?plummet?along?with?their?,metabolism.?The?body?becomes?more?efficient?at?using?fuel?and?conserving?fat,?which?makes?it?toughto?keep?the?weight?off.?Obese?dieters?bodies?go
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