雅思攻略之地图题与流程图

在烤鸭江湖中一直流传着这么一句话：

地图题暴打南北，流程图狂扁东西。这一对让众多考鸭闻风丧胆的非数据小作文，随着剑十四又一次重出江湖，为害一方，可谓是恶贯满盈，无恶不作，十恶不赦，穷凶极恶。

我等众人一生良善，不堪屈辱，故奋起抵抗，身先士卒。今日与诸位烤鸭中的侠义之士，共商诛流程伐地图之大计。

先来看看这流程图和地图题为何方神圣!

列位英雄，我们先来观瞻一下这个不按常理出牌的流程图。以往剑桥真题中的大部分流程图箭头指向明朗，思路清晰。而此题则不然，故弄玄虚，虚张声势。实则暗藏白天和夜晚两套工作原理。毫无疑问，在文章中，此二者缺一不可。

如下例文供诸位参考：

The working theory of a hydropower station built on a river is demonstrated by this flow chart. The operating mode of it varies from the daytime to the night.

By daylight, water stored in a high-level reservoir initially flows downstream through the intake under the dam, and then drives turbines, and finally arrives at a low-level reservoir. These turbines, powered by the water flow, can correspondingly operate a generator in the power station. The electricity produced, in the last step, will be transferred to the National grid through power lines.

By night, water in the low-level reservoir can be pumped upstream to the high-level one through the same riverway by reversible turbines spinning in the opposite direction as the daytime. The intake under the dam is a non-return one, which is closed at night in order to ensure that water can flow into the reservoir, but not out.

To sum up, the power station functions in totally opposite ways in the daytime and at night. In the whole process, water is utilized as the energy carrier, which at first releases its gravitational energy to produce electricity and then helps transform electricity into gravitational energy.

流程图花样频出，但是这个地图题却是老生常谈。在命题形式和难度上毫无过人之处。解题思路无需多言。

各位请看官版例文：

正所谓你有张良计，我有过墙梯。鄙人不才，结各大门派，联手成书一本。武林浩瀚，江湖险恶。各位壮士侠肝义胆，屠鸭之路万险千难。我看各位骨骼奇异，经脉不群，身强体壮，心胸坦荡。故以此秘籍相送，愿诸位悉心研读，得之精要，铲奸除恶，为国为民。