图表种类 曲线图 图表instruction The graph below shows the average monthly salary in Japan from 1953 to 1973, together with the prices of the black and white TV and colour TV during the same perioD、Summarize the information by selecting and reporting the main features, and make comparisons where relevant. 图表要素回忆一共出现3条线，分别代表日本平均月工资以及黑白和彩色电视的价格；描述过程中要牢记不仅做到单条线的变化趋势的细节介绍，更要留意3条线之间的关系和比较；尤其是遇到特殊关系比较时一定要重点标出。