地图题的必会词汇：

Sparsely-populated 人口稀少的 densely populated 人口稠密的lack basic facilities 缺乏基础设施 two crossing  main road 两条交叉的主路，intersection 交叉，link 连接  parallel with ,,, 与。。。平行 go through 贯穿 east(west,north,south)bound  向东（西，南，北）的Found/construct/build 建立，along 沿着  scatter 分散，come into being/take shape/form 形成

 流程图必会词汇：

form/come into being/take shape 形成produce 生产 /gain /get/ acquire 获取 evaporate  蒸发/volatilize 挥发 draw 提取/ recycle 回收/ extract 拔/ absorb 吸收 /collect/ 收集 meet 相遇 / be made up of/由。。。组成 be made of由。。。制成/ be made from 由 。。。制成 /feed  on 以。。。为食/depend on /rely on 依赖 /release/send out 释放/sort分类 /separate 分开

流程图模板：

第一段所使用的句子：

      It mainly consists of

      It works as follows

      It always involves following steps

      The whole procedure can be divided into __ stages.

表第一阶段的句子：

1.The process starts from----

At the first/initial stage, ----

At the beginning of the cycle, ----

During the initial phase,+句子

The beginning of the whole cycle is marked by, ----

2. 表第二阶段的一些说法：

The second stage is----

The next step in the process is----

3. 表最后阶段的句子：

----is the last step in the procedure.

The final phase of the procedure is about----

In the final phase,+句子

----is the final stage.