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【单选题】
进给电动机、传动机构或是电动机驱动集成电路有故障,使得 CD 唱机(),整机不能进入工作状态。
A.
不能找到光盘的信息部位
B.
不能是激光束聚焦
C.
激光头不能发射激光束
D.
光盘不能旋转
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】A new era is upon us. Call it what you will: the service economy, the information age, the knowledge society. It is all translated to a fundamental change in the way we work. Already we've partly been...
A.
the service industry is relying more and more on the female work force
B.
manufacturing industries are steadily increasing
C.
people find it harder to earn a living by working in factories
D.
most of the job opportunities can now be found in service industry
【单选题】CD4028 集成电路是 ______________ 集成电路。
A.
十六进制/十进制译码器集成电路
B.
BCD/ 十进制译码器集成电路
C.
BCD/八进制译码器集成电路
D.
以上都错误！
【单选题】亚龙YL-335A自动化生产线三相步进电动机驱动器的()端子应与西门子S7-200PLC的Q0.2方向端连接。
A.
PLS+
B.
PLS-
C.
DIR+
D.
DIR-