无锡GRE培训课程在哪学

无锡GRE培训课程在哪学？GRE数学是大家较容易拿分的，但对于部分同学来说，数学却是需要努力复习争取不拉分的部分。下面就由给大家带来GRE数学中按比例看图的分析。希望对大家备考有所帮助。

无锡GRE培训课程在哪学

为了给学员提供更专业的学术支持，朗阁教育(Longre)先后成立了从事海外考试教学研究的学术机构朗阁海外考试研究中心(RAFLE)以及专注德法西意及日韩语研究的小语种教学研发中心，为广大考生在复习备考、资料下载、考题跟踪及业界动向等方面提供咨询。

以下，是GRE官方指南(OG)中有关什么是按照比例，什么不是按照比例绘制的说明(或者说是important assumptions)

1. Geometric figures, such as lines, circles, triangles, and quadrilaterals, are not necessarily drawn to scale. That is, you should not assume that quantities such as lengths and angle measures are as they appear in a figure. You should assume, however, that lines shown as straight are actually straight, points on a line are in the order shown, and more generally, all geometric objects are in the relative positions shown. For questions with geometric figures, you should base your answers on geometric reasoning, not on estimating or comparing quantities by sight or by measurement.

2. Coordinate systems, such as xy-planes and number lines, are drawn to scale; therefore, you can read, estimate, or compare quantities in such figures by sight or by measurement.

3. Graphical data presentations, such as bar graphs, circle graphs, and line graphs, are drawn to scale; therefore, you can read, estimate, or compare data values by sight or by measurement.

简而言之就是：几何图形未必按照比例绘制，但是坐标系和图表题是按比例绘制的。

到底是怎样的，我们在回头看一下官方有关几何图形的题目的出题前提：

Geometric figures, such as lines, circles, triangles, and quadrilaterals, are not necessarily drawn to scale.

但是后面注意，有however!(注：这是感叹号，不是factorial)

however, that lines shown as straight are actually straight, points on a line are in the order shown, and more generally, all geometric objects are in the relative positions shown.