题目

北京和广州两地的自转角速度和线速度相比较，正确的叙述是 A．两地的角速度和线速度都相同 B．两地的角速度和线速度都不相同 C．角速度相同，线速度广州大于北京 D．角速度不相同，线速度相同 答案：C 解析: 略A board ____ by the side of the well on which these words ____ “Don't forget the digger when you fetch water from the well.” A.set up; wroteB.put up; wroteC.was put up; is writtenD.was set up; were written