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发布时间:2024-02-09 01:27:09

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American doctors say mothers who smoke cigarettes may slow the growth of their children’ s lungs (肺). They said reduced lung growth could cause the children to suffer breathing problems and lung diseases (疾病) later in life. Doctors studied more than 1 100 children between the ages of five and nine. The mothers of some of the children smoked; the other mothers did not. Doctors tested the children once a year for five years to see how fast their lungs were growing. The test measured the amount of air the children could blow out of their lungs in one second. Children should be able to blow out more air each year because their lung-power increases as their lungs develop. But the doctors found that the lungs of the children whose mothers smoked had not developed as fast as they should. Doctors are not sure when the mothers’ smoking affected (影响) the children’s lungs. They say it could have happened before birth because the mothers smoked during pregnancy (怀孕) or it c
A. Ten times.
B. Five times.
C. Once.
D. Twice.

更多"American doctors say mothers who sm"的相关试题:

[单项选择]

American doctors say mothers who smoke cigarettes may slow the growth of their children’ s lungs (肺). They said reduced lung growth could cause the children to suffer breathing problems and lung diseases (疾病) later in life. Doctors studied more than 1 100 children between the ages of five and nine. The mothers of some of the children smoked; the other mothers did not. Doctors tested the children once a year for five years to see how fast their lungs were growing. The test measured the amount of air the children could blow out of their lungs in one second. Children should be able to blow out more air each year because their lung-power increases as their lungs develop. But the doctors found that the lungs of the children whose mothers smoked had not developed as fast as they should. Doctors are not sure when the mothers’ smoking affected (影响) the children’s lungs. They say it could have happened before birth because the mothers smoked during pregnancy (怀孕) or it c
A. Ten times.
B. Five times.
C. Once.
D. Twice.

[填空题]American doctors say that mothers smoke before their (76)
babies are born may slow the growth of their babies (77)
lungs. They say’ reducing lung growth could cause (78)
the babies suffer breathing problems and lung disease (79)
late in life. Doctors in Boston studied 1,100 children. (80)
The mothers of some of the children smoked; the other (81)
Mothers did not. Doctor found out that the lungs of the (82)
children whose mothers smoked were 8% less developed as (83)
the children whose mothers did not smoke, that the (84)
children whose mothers smoked were developed 20% more (85)
cold and breathing diseases than the other children.


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