[单项选择]According to the author, the distinction between violent acts and non-violent ones in sports is ______.
A. impossible to make
B. not very clear in any circumstances
C. too obvious to escape observation
D. not very difficult to make if enough attention is paid to

[单项选择]According to the author, the distinction between violent acts and nonviolent ones in sports is______.
A. impossible to make
B. not very clear in any circumstances
C. too obvious to escape observation
D. not very difficult to make if enough attention is paid to

[单项选择]According to the author, distinctions between those engaged in the creative arts and in natural sciences can in part be explained by________.
A. the different objectives of those involved in these respective pursuit
B. the different ways in which they attempt to extend accepted conventional forms
C. the different methods they employ in the collection of data to support their theories
D. the different principles of organization that they utilize in order to create new works

[单项选择]

The traditional distinction between products that satisfy needs and those that satisfy wants is no longer adequate to describe classes of products. In today’s prosperous societies the distinction has become obscure because so many wants have been turned into needs. A writer, for instance, can work with paper and pencils. These are legitimate needs for the task. But the work can be done more quickly and efficiently with a word processor. Thus a computer is soon viewed as a need rather than a want. In the field of marketing, consumer goods are classed according to the way in which they are purchased. The two main categories are convenience goods and shopping goods. Two lesser types are specialty goods and unsought goods. It must be emphasized that all of these types are based on the way shoppers think about products, not on the nature of the products themselves. What is regarded as a convenience item in France (wine, for example) may be a specialty good in the United States.
A. impatiently.
B. With a start.
C. recklessly.
D. under no consideration.

[单项选择]The distinction between competence and performance is proposed by ______.
A. Saussure
B. Halliday
C. Chomsky
D. the Prague School

[单项选择]According to the author, the various conflicting views of education.
A. add complexity and richness to the profession
B. demonstrate the fallacies of the economic approach
C. prevent progression towards the economic aim
D. ensure that one particular philosophy is not overly dominant