单选题
American doctors say that mothers who smoke before their
babies are born may slow the growth of their babies' lungs. They say reduced
lung growth could cause the babies to have breathing problems and lung illness
later in life. Doctors in Boston, Massachusetts studied 1,000 children. The
mothers of some of the children smoked, the other mothers did not. Doctors found
that the lungs of the children whose mother smoked were 8% less developed than
the children whose mothers did not smoke, and that the children whose mothers
smoked developed 20% more cold and breathing illness than other children later
in life. Another recent study found that children had a greater
chance of developing lung cancer if their mothers smoked. The study also showed
that the danger of lung cancer increased only for sons and not for daughters,
and that the father's smoking did not affect a child's chance of developing lung
cancer.
单选题
Mother who smokes before their child is born may ______.
A. slow the growth of her baby's lung
B. make her child develop lung cancer
C. both A and B
【正确答案】
A
【答案解析】[解析] 根据第一段第一句可知会影响孩子的肺的生长发育，可知答案为A。
单选题
Doctors in Boston studied 1,000 children to ______.
A. examine whether these children were healthy
B. find out who smoke
C. find out the condition of children whose mother smoke
【正确答案】
C
【答案解析】[解析] 通读全文可知，研究的目的是想看母亲吸烟对孩子的影响，可知答案为C。
单选题
If a mother smoke, the lungs of the children ______.
A. develop quickly
B. develop well
C. less developed
【正确答案】
C
【答案解析】[解析] 根据文意。可知答案为C。
单选题
What disease are the children likely to have if their mother smoke?
A. Headache.
B. Foot.
C. Lung canter.
【正确答案】
C
【答案解析】[解析] 根据第二段第一句可知吸烟母亲的孩子得肺癌的几率比较高，可知答案为C。
单选题
If parents both smoke, who has a worse effect on children?