单项选择题

The primary purpose of the passage is to

A． compare a philosopher's system of dramatic principles with that of the author's
B． enumerate one philosopher's view of the principles underlying good drama
C． analyze the similarities and dissimilarities between the various dramatic principles at work in Greek drama
D． contrast one philosopher's dramatic principles with those of the tradition that preceded him
E． demonstrate the wisdom and longevity in one philosopher's dramatic principles

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单项选择题

The author suggests that Aristotle believed which of the following was true of the dramatic art that existed prior to Aeschylus

A． It was unusually resourceful in finding ways to extend the unity of time beyond a single day.
B． It was less elegant than later drama because its disregard for unity of place necessitates the movement of the chorus.
C． It tended to demonstrate better unity of time than of character and action.
D． It did not employ a beginning middle or end, and this fell outside the acceptable range of dramatic principles.
E． It tended to overemphasize the use of cause and effect, instead of the continuity of time, in organizing its action.

单项选择题

The passage provides information that would answer which of the following questions

A． What are some of the structural and chemical properties that nanotechnologists strive to create when they mold molecules
B． Why are the techniques of scanning probe microscopy necessary to the production of objects and molecule arrays in the top-down method
C． Which is more important to the future of nanotechnology, scientists' use of the theoretical principles or practical experience
D． Has the nanometer scale been considered easier than the angstrom scale for nanotechnologists to work with
E． For what reasons do bottom-up nanotechnologists prefer to work with three- dimensional chemical systems that cohere according to the rules of chemical interactions