计划的结果不仅取决于计划制定得是否正确，还有赖于计划的执行与控制的效率如何。( )
参考答案：对
When he heard the _______ news that an earthquake occurred in Sichuan, he felt very___________.
A．frightened; frightened
B．frightened; frightening
C．frightening; frightening
D．frightening; frightened
B．速度减小，加速度增大
C．速度先增大后减小，加速度先增大后减小
D．速度先增大后减小，加速度先减小后增大
