CHICAGO - Smoking not only can wrinkle the face and tarn it yellow-it can do the

CHICAGO （Reuters） -Smoking not only can wrinkle （起皱纹） the face and tarn ityellow—it can do the same to the whole body,researchers reported on Monday．

The study,published in the Archives of Dermatology, shows that smoking affects the skinall over the body—evenskin protected from the sun．

"Weexamined non - facial skin that was protected from the sun, and found that thetotal number of packs of cigarettes smoked per day and the total years a personhas smoked were linked with the amount of skin damage a personexperienced," Dr．YolandaHelfrich of the University of Michigan, who led the study, said in a statement．

"Inparticipants older than 65 years, smokers had significantly more fine wrinklingthan nonsmokers．Similarfindings were seen in participants aged 45 to 65 years," Helfrich "steam added in their report．

Theresearchers tested 82 people, smokers and nonsmokers, taking pictures of theinner right arms． Theyranged, in age from 22 to 91 and half were smokers．Independentjudges decided how wrinkled each person' s skin was．

When skin isexposed to sunlight, notably the face, it becomes coarse, wrinkled and discoloredwith a pale yellow tint, Helfrich ' s team wrote．

Severalprevious studies have found that cigarette smoking contributes to premature（过早的）skin aging as measured by facialwrinkles, the study said, but little has been done to measure the aging of skinnot exposed to light．

The report didnot discuss die mechanism involved but previous research has found thatcigarette smoke, among other things, causes blood vessels （血管） beneath the skin to constrict （紧缩）, reducing blood supply to the skin．

Smoking canalso damage the connective tissue that supports both die skin and the internalorgans,．

1.When your skin is exposedto sunlight long, it-becomes all of the following but _____．

   A．flexible       B．coarse                          C．rough     D．discolored

2.How wrinkled a person'sskin is doesn't relate to _____．

   A．thenumber of cigarettes a person smokes．    

   B．thekind and characteristics of skin

   C．howlong a personsmokes              

   D．howlong skin is under sunlight

3.From the passage smokingresults in skin aging mainly because _____.

   A．it willlower blood supply toskin                

   B．it canmake you feel tired

   C．it canmake skin come off                         

   D．it canmake blood run faster

4.The main purpose of thepassage is to _____．

   A．informpeople about the result of the study        

   B．advisepeople how to protect skin

   C．warnpeople not to smokeagain                    

    D．introduce a new way of avoid skin aging

试题答案

【答案】

1.A2.B3.A4.C

【解析】略