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American doctors say that mothers smoke before their 【M1】
American doctors say that mothers smoke before their 【M1】
游客
2025-07-21
13
管理
问题
American doctors say that mothers smoke before their 【M1】______
babies are born may slow the growth of their babies 【M2】______
lungs. They say reducing lung growth could cause 【M3】______
the babies suffer breathing problems and lung disease 【M4】______
late in life. Doctors in Boston studied 1, 100 children. 【M5】______
The mothers of some of the children smoked;the other 【M6】______
Mothers did not. Doctor found out that the lungs of the 【M7】______
children whose mothers smoked were 8% less developed as 【M8】______
the children whose mothers did not smoke, that the 【M9】______
children whose mothers smoked were developed 20% more 【M10】______
cold and breathing diseases than the other children. [br] 【M7】
选项
答案
Doctor改成Doctors
解析
表示一类人时用名词加s或冠词加名词的形式来表示。
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