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Muslims in northern Nigeria is cited as an example to show that
A.eradication of polio has been hampered by the conspiracy of Muslims.
B.eradication of polio met many obstacles there.
C.vaccination program was harmful to the children there.
D.vaccination program strengthened and spread virus.

A.eradication
B.
B.eradication
C.
C.vaccination
D.
D.vaccination
E.


【参考答案】

B
事实细节题,考查例证细节。根据MuslimsinnorthernNigeria定位到第五段。可以发现文中第四、五段讲述的都是疫苗接种(vaccine)在各国遇到的阻碍(obstacles),因此B项符合文意。
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