GRE阅读高频机经原文及答案：舞蹈物理动作分析

　　26. 舞蹈物理动作分析 1994年02月 D9402

　　Analyzing the physics of dance can add fundamentally to a dancers skill. Although dancers seldom see themselves totally in physical terms as body mass moving through space under the influence of well-known forces and obeying physical lawsneither can they afford to ignore the physics of movement. For example, no matter how much a dancer wishes to leap off the floor and then start turning, the law of conservation of angular momentum absolutely prevents such a movement.

　　Some movements involving primarily vertical or horizontal motions of the body as a whole, in which rotations can be ignored, can be studied using simple equations of linear motion in three dimensions . However, rotational motions require more complex approaches that involve analyses of the way the bodys mass is distributed, the axes of rotation involved in different types of movement, and the sources of the forces that produce the rotational movement.

　　26.1 The primary purpose of the passage is to

　　initiate a debate over two approaches to analyzing a field of study

　　describe how one field of knowledge can be applied to another field

　　point out the contradictions between two distinct theories

　　define and elaborate on an accepted scientific principle

　　discuss the application of a new theory within a new setting

　　26.2. The author mentions all of the following as contributing to an understanding of the physics of dance EXCEPT:

　　the law of conservation of angular momentum

　　analyses of the way in which the bodys mass is distributed

　　equations of linear motion in three dimensions

　　analyses of the sources that produce rotational motions

　　the technical terms for movements such as leaps and turns

　　26.3.The author implies that dancers can become more skilled by doing which of the following?

　　Ignoring rotational movements

　　Understanding the forces that permit various movements

　　Solving simple linear equations

　　Learning the technical terms utilized by choreographers

　　Circumventing the law of conservation of angular momentum

　　26.4.Analysis of which of the following would require the kind of complex approach described in the last sentence?

　　A long leap across space

　　A short jump upward with a return to the same place

　　A sustained and controlled turn in place

　　Short, rapid steps forward and then backward without turning

　　Quick side steps in a diagonal line

　　答案：BEBC