数控制机床位置检测装置中（）属于于旋转型检测装置。
A、光栅尺
B、磁棚尺
C、感应同步器
D、脉冲编码
参考答案：D
大众传播的主要功能有哪些？
I would like to ( ) a flight to Paris on January 8 on Air France, First Class and round trip.
A．have book
B．book
C．want
D．have wanted
