A. is based merely on sociological calculations B. can always predict accurate results C. has been used in other countries other than the US D. has become the best choice in predicting scientific results 参考答案:C 答案解析:从第七段第一句和第九段第一句可得知Gallup民意调查结合了社会调查和数学运算,因此A不正确。倒数第三段谈到用Gallup民意调查预测1948年的总统选举结果失败了,可见B也不正确。倒数第二段谈到英国