单项选择题

The perpetual spinning of particles is much like that of a top, with one significant difference: unlike the top, the particles have no need to be wound up, for ______ is one of their ______ properties.

(A) revolution...radical
(B) motion...intangible
(C) rotation...intrinsic
(D) acceleration...lesser
(E) collision...hypothetical
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单项选择题
Although he was generally considered an extremely ______individual, his testimony at the trial revealed that he had been very ______.
(A) intrepid...valiant
(B) guileless...hypocritical
(C) abstemious...temperate
(D) meek...timorous
(E) ingenuous...obtuse
单项选择题
The author implies that the Quechua world was
(A) uncivilized
(B) highly introspective
(C) vitally energetic
(D) free of major worries
(E) well organized
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