改错题
Mass media is media that is intended for a large audience. It may take the form of broadcast media, as in case of television and【M1】______ radio, or print media, as newspapers and magazines. 【M2】______ Usually, mass media aims to reach a very large market, such as the entire population of a country. By contrast, local media covers a much small population and area, focusing on regional news of【M3】______ interest, specialty media is provided for particular demographic【M4】______ groups. Some local media outlets that cover state or provincial news may raise to prominence thanks to their investigative journalism, and【M5】______ to the clout that their particular regions have in the national politics. People often think of mass media as the news, it also includes【M6】______ entertainment like television shows, books, and films. It may also be educational in the nature, as in the instance of public broadcasting【M7】______ stations that provide educational programs to a national audience. Political communications including propaganda are also frequently distributed through the media, as were public service announcements【M8】______ and emergency alerts. When elitists may be tempted to sneer at mass media, referring【M9】______ to it as the ""opiate of the masses"", it is a critical part of human societies. Understanding mass media is usually the key to understand【M10】______ a population and culture, which is why the field of media studies is so huge.