单选题 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、 (A) revolution...radical
B、 (B) motion...intangible
C、 (C) rotation...intrinsic
D、 (D) acceleration...lesser
E、 (E) collision...hypothetical

【正确答案】 C

【答案解析】Particles have no need to be wound up because the property of spinning (rotation) is built into their makeup: it is intrinsic. `