The difficulty of "Compulsory 2 of Senior High School Mathematics Edition A" is from shallow to deep, and the overall difficulty belongs to the middle stage. This book was published by People's Education Press 20 13, and the author was Wang Shenhuai. The main content of this book is the basic knowledge of geometry. Through the study of this book, students should achieve the following goals:

1. Using physical models and computer software to observe a large number of spatial graphics, we can understand the structural characteristics of columns, cones, platforms, spheres and their simple combinations, and use these characteristics to describe the structure of simple objects in real life.

2. Can draw three views of simple combinations such as cuboid, sphere, cylinder, cone and prism, can identify the three-dimensional model represented by the above three views, can make models with materials, and can draw their vertical views by oblique two-sided method.

3. By observing and drawing views and straight views with parallel projection and central projection, we can understand different representations of spatial graphics.

4. Complete practical work, such as drawing views and direct views of some buildings. On the basis of not affecting the graphic characteristics, the size and lines are not strictly required.

5. Understanding the formulas for calculating the surface area and volume of spheres, prisms, pyramids and platforms does not require memorizing formulas.