填空题
A—Public Opinion Polls B—Political Surveys
C—Religious Beliefs D—The Mass Media
E—The National Census F—Urban People
G—Unmarried Couple H—The Roadside Signs
I—Advertising Messages J—Small Workshop
K—A Fascinating Business L—Television Commercials
M—A Specific Product N—Modern Advertising
O—Person-to-person Contact
______广告信息 ______城市居民
【参考答案】
I，F