【正确答案】 The main differences between the Canadian and US political system are as follows: ①The basic political system of Canada is constitutional monarchy while the US is a presidential republic. ②Canada employs the British model of government, which has a strong central government which offers "strength, order and authority". The official head of state is the Queen but she is represented by an official called Governor General. In contrast, the American system is characterized by "checks and balances" on political power with the powers of government divided into three branches, the executive, the legislative, and the judicial. ③Canada's parliament consists of the Queen, the Senate and the House of Commons while American Congress is composed of the Senate and the House of Representatives. ④Canadian cabinet is composed of privy councilors while American cabinet is made up of the most ministers of the most important departments. ⑤ Canada's system of political parties is characterized by one party rule. Either of the two main federal parties in Canada which are the Liberal Party and the Progressive Conservative Party (The Progressive Conservative Party and the Canadian Alliance merged into the Conservative Party in 2003), forms the federal government. However, America has a two-party system, which means that two major political parties—now the Democrats and the Republicans—dominate politics at the federal, state and local levels.