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

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.