US and allied officials have said they have seen no credible evidence of civilian casualti
伤亡
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US and allied officials have said they have seen no credible evidence of civilian casualties（伤亡）from the air campaign,and they say that precision weapons are used in the strikes in an effort to()being hurt．
A． prevent civilians on
B．prevent civilians from
C． Prevent civilians to
D．Prevent civilians in
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正确答案：B
B[解析]prevent... from doing。…的意思是：阻止……受到……，符合题意。句子的意思是：……，他们说这种精准度很高的武器用于这次罢工运动的目的是防止百姓受到伤害。