3.paragraph 6 _________
b. researchers’ opinions divided
c. positive(肯定,确定) effects of smoking as advertised
e. breslau’s conclusion supported by
another larger study
f. effect of smoking on
mental health initially proved
解析:6. breslau
was one of the first to consider this heretical异端的 possibility. the hint 线索came from studies, published in 1998, which followed a group of just
over 1,000 young adults for a five-year period. 期间 the 13 per cent who began the study with major
depression 沮丧were
around three times more likely to progress发展
进步 from being light
smokers to daily smokers during the course of the study, though there was no
evidence证据 that
depression 沮丧increased
the tendency趋势 to
take up smoking. but a history of daily smoking before the study commenced开始 roughly doubled 两部的the risk of developing major
depression during the five-year period smoking, it seems, could pre-date提早,预先illness.