Trắc nghiệm: The basic elements(A) of public-opinion research are(B) interviewers. questionnaires. tabulating (C)equipment. and to sample (D) population. | Gửi trắc nghiệm |
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Trắc nghiệm: The basic elements(A) of public-opinion research are(B) interviewers. questionnaires. tabulating (C)equipment. and to sample (D) population. | Gửi trắc nghiệm |