题目内容
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[主观题]
Which of the following is NOT true？A．The mothers' smoking during pregnancy could have affe
Which of the following is NOT true？
A．The mothers' smoking during pregnancy could have affected the children's lungs.
B．Doctors are sure that children whose mothers smoked developed 20% more colds, flu and other breathing diseases than other children.
C．Doctors are sure when the mothers' smoking affected the children's lungs.
D．Smoke-filled air at home could have affected the children's lungs.
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