精选优质文档-倾情为你奉上高一英语阅读理解试题（科技类）三(11)American doctors say that mothers who smoke cigarettes before their babies are born may slow the growth of their babies lungs. They say reduced lung growth could cause the babies to suffer breathing problems and lung disease later in life. Doctors in Boston, Massachusetts studied 1 100 children. The mothers of some of the children smoked, the other mothers did not. Doctors found that the lungs of the children whose mothers smoked were 8% less developed
