【正文】 wer didn’t make its debut until 1998. 首段 首句 This graph shows the 數(shù)據(jù)形式 of 對象 in 地點 時間 . 二句 有可能 的話總結(jié)總體趨勢 中間段 趨勢描寫，數(shù)據(jù)支持，有必要時寫出最高點 /最低點 末段 重申最重要的趨勢 七、線性作文寫作要點 八、線性圖范文 ?（ 一）單條曲線范文 ? （二）雙條曲線范文 ? （三）多條曲線范文 Number of fulltime teachers of regular schools (in millions) in China (19601990). 02468101260y 62y 64y 66y 68y 70y 72y 74y 76y 78y 80y 82y 84y 86y 88y 90y Example one This graph shows the number of fulltime teachers of regular schools in China between 1960 and 1990. It can be seen that there was an increasing trend from 1960 to 1990. However, there were some fluctuations in earlier years. According to the figure, there was a sharp decrease in the number of teachers from five million in 1960 to three million in 1962, which was followed by a rapid increase over the next two years. The number dropped again from almost six million in 1964 to five million in 1966 and then went up gradually until 1976 when there was a leveling off at eight million for the next ten years. The years from 1986 to 1990 saw a steady rise in the number of teachers. In conclusion, more teachers were in Chinese regular schools in the 1990s than 30 years before. The graph below shows radio and television audiences throughout the day in 1992. Radio and television audiences in the UK, OctoberDecember 1992. 多條曲線：（ 中間段落） 1. 分別寫三條曲線 2. 分階段對比三條曲線 3. 混合寫法（先寫將其中兩條分階段對比寫），再寫剩下的一條 The graph below shows the proportion of the population aged 65 and over between 1940 and 2040 in three different countries. Summarise the information by selecting and reporting the main features, and make parisons where relevant. The line graph shows the proportion of people in Japan, Sweden, and USA aged 65 and over from 1940 and the expected proportions up to 2040. From 19401990, the proportions of aged 65 and over in the USA and Sweden WERE similar follow the same trend. In 1940 the figures were 9% and 7% respectively in , American’s proportion of people aged 65 and over leveled out and is forecasted to remain in 14% until 2020, after which it is expected increase to 23% in 2040. however, Sweden’s proportion of people aged 65 and over began to rise after 1990. This increase is forecasted to continue until 2021 when the proportion is estimated to be 20%. Then there is expected to be a slight drop to 18% in 2030, followed by a steep climb to 25% in 2040. The situation in Japan differs considerably, with a fall in the percentage of people aged 65 and over between 1940(5%) to 1960(3%). The percentage remained steady until 1985, where upon it began to climb. This rise is projected to continue until around 2030, when the proportion of Japannese aged 65 and over is expected to reach 10%. Thereafter, within just a few years, the proportion is forecast to rise dramatically to 25%, with a less darmatic rese to 27% in 2040. 九、作業(yè)： Homework ?略