单选题 The machinery had been wrecked so efficiently that police were sure it was a case of ______.
  • A. vagabond
  • B. sabotage
  • C. paradox
  • D. tachyon
【正确答案】 B
【答案解析】sabotage破坏活动；妨害。vagabond流浪者；懒汉。paradox自相矛盾的议论。tachyon速子(一种假设的快于光速的基本粒子)。