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Analyzing the physics of dance can add fundamentally to a dancer's 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 laws -- neither can they afford to ignore the physics of 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 body's mass is distributed, the axes of rotation involved in different types of movement, and the sources of the forces that produce the rotational movement. (120 words)
1. The primary purpose of the passage is to
(A) initiate a debate over two approaches to analyzing a field of study
(B) describe how one field of knowledge can be applied to another field
(C) point out the contradictions between two distinct theories
(D) Define and elaborate on an accepted scientific principle
(E) discuss the application of a new theory within a new setting
For the following question, consider each of the choices separately and select all that apply
答案：选 B
2. The author mentions all of the following as contributing to an understanding of the physics of dance
A analyses of the way in which the body's mass is distributed
B equations of linear motion in three dimensions
C analyses of the sources that produce rotational motions
答案：选 ABC