职称英语考试卫生类B完形填空训练题

XX年职称英语考试卫生类B完形填空训练题 　　xx年考试备考开始啦，为了帮助大家更好地备考职称英语考试，网为大家提供了相应的练习题，以下是xx年职称英语考试卫生类B完形填空训练题，供大家复习备考。【】

XX年职称英语考试卫生类B完形填空训练题 xx年考试备考开始啦，为了帮助大家更好地备考职称英语考 试，网为大家提供了相应的练习题，以下是xx年职称英语考试卫生 类B完形填空训练题，供大家复习备考。【】 While some teenagers may puff on cigarettes to "self-medicate” against the blues, scientists atthe University of Toronto and the University of Montreal have found that smoking mayactually 1depressive symptoms in some teens. "This observational study is one of the few to examine the perceived2benefits ofsmoking among teens," says lead researcher Michael Chaiton, aresearch associate at the OntarioTobao Research Unit of the University of Toronto. " 3cigarettes may appear to haveself-medicating4or to improve mood, in the long term we found that teens who started tosmoke reported higher depressive symptoms." As part of the study, some 662 high school teenagers pleted up to 20 questionnaires5theiruse of cigarettes to affect mood. Secondary schools were selected to provide a mix of French andEnglish participants, urban and rural schools, and schools 6in high, moderate and lowsocio-economic neighbourhoods. Participants were divided into three7: never smokers: smokers who did not use cigarettesto self-medicate, improve mood or physical8 ;smokers who used cigarettes to