| Mark Twain once observed that giving up
smoking is easy. He knew, because he’ d done it hundreds of times himself.
Giving up for ever is a trifle more difficult, apparently, and it is well known
that it is much more difficult for some people than for others. Why is this
so Few doctors believe any longer that it is simply a question of will power. And for those people that continue to view addicts as merely "weak", recent genetic research may force a rethink. A study conducted by Jacqueline Vink, of the Free University of Amsterdam, used a database called the Netherlands Twin Register to analyze the smoking habits of twins. Her results, published in the Pharmacogenomics Journal, suggest that an individual’ s degree of nicotine dependence, and even the number of cigarettes he smokes per day, are strongly genetically influenced. The A. he is a man with very Strong will power. B. it is easy to give up smoking temporarily. C. famous writers are often heavy smokers. D. only few people have his determination. [单项选择]
Mark Twain once observed that giving up smoking is easy. He knew, because he’d done it hundreds of times himself. Giving up for ever is a trifle more difficult, apparently, and it is well known that it is much more difficult for some people than for others. Why is this so 我来回答: 提交
|
