数控机床按其运动轨迹控制方式不同可分为（）。
A、开环控制
B、直线控制
C、点位控制
D、闭环控制
E、连续轮廓控制
F、半闭环
参考答案：B, C, E
_______, it wont' be the only factor concerning your happiness.[ ]
A. As the result of the exam might be important
B. As important the result of the exam might be
C. Important as might the result of the exam be
D. Important as the result of the exam might be
基于法定事实被辞退的公安民警，不享受待业保险。 ( )
