第30题: [单项选择]The new technological revolution in American newspapers has brought increase ______, a wider range of publications and an expansion of newspaper jobs. A. manipulation B. reproduction C. circulation D. penetration 参考答案:C 答案解析:circulation发行量;流通,循环。manipulation操作,控制。reproduction繁殖,生殖,繁殖方式。penetration穿透,穿透能力,穿透深度。