一、美国传媒的步步紧逼在广播事业发展初期，加拿大的电台多为私营台，仅有的公共广播电台均属加拿大国营铁路公司（CNR）所有，因此加拿大无力应对美国节目的侵袭，这种状况迫使加拿大政府采取一系列防范措施。而后加拿大广播公司逐渐取代私营台占据广播事业的主导地位，因此 First, the United States media press harder and harder In the early days of the broadcasting industry, Canada’s radio stations were mostly private stations, and the only public radio stations were owned by CNR. As a result, Canada was unable to cope with the invasion of U.S. programs. The situation forced the Canadian government to take a series of precautionary measures. As a result, CBC gradually replaced private sector’s dominance of broadcasting and therefore