② 选择来源: 要找到足够的文献材料来进行工作. 这个阶段, 重点是区分不同类型的来源, 并找到有效信息. 来源一般有两种. As you’ve now determined what subject you will be producing about, another thing you should listen to would be the scope of your paper or what you will end up which includes in your�