Theoretical physicists use mathematics to describe certain aspects of Nature. Sir Isaac Newton was the first theoretical physicist, although in his own time his profession was called "natural philosophy".
By Newton’s era people had already used algebra and geometry to build marvelous works of architecture, including the great cathedrals of Europe, but algebra and geometry only describe things that are sitting still. In order to describe things that are moving or changing in some way, Newton invented calculus.
The most puzzling and intriguing moving things visible to humans have always been the sun, the moon, the planets and the stars we can see in the night sky. Newton’s new calculus, combined with his "Laws of Motion", made a mathematical model for the force of gravity that not only described the observed motions of planets and stars in the night sky, but also of s
Practitioners in all the theoretical perspectives that we have reviewed use interviews to assess personality. The techniques range from informal conversational exchanges to well-organized series of specific questions designed to elicit (诱出) specific responses. Good interviewers do not limit their attention to what the interviewee says; they also look at how he or she says it. They note the interviewee’s general appearance, voice and speech patterns, the contents of his or her thoughts, and facial expressions and posture(姿态).
The interview is valuable for the direct personal contact that it provides, but it has some limitations, particularly from a research standpoint. For example, it is difficult to quantify everything that goes on in an interview. The person being interviewed may not understand or may resist the purpose behind the interview. Interviewees may state facts, opinions, and attitudes in a reliable fashion; but, in some cases, they may distort facts and l
A. his appearance and thoughts
B. his non-verbal behavior
C. the quality and volume of his speech
D. the content and way of his speech
Passage Two
Practitioners in all the theoretical perspectives that we have reviewed use interviews to assess personality. The techniques range from informal conversational exchanges to well-organized series of specific questions designed to elicit (诱出) specific responses. Good interviewers do not limit their attention to what the interviewee says; they also look at how he or she says it. They note the interviewee’s general appearance, voice and speech patterns, the contents of his or her thoughts, and facial expressions and posture(姿态).
The interview is valuable for the direct personal contact that it provides, but it has some limitations, particularly from a research standpoint. For example, it is difficult to quantify everything that goes on in an interview. The person being interviewed may not understand or may resist the purpose behind the interview. Interviewees may state facts, opinions, and attitudes in a reliable fashion; but, in some cases, t
A. his appearance and thoughts
B. his non-verbal behavior
C. the quality and volume of his speech
D. the content and way of his speech
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