题目内容

Master-Slave：Selects for Master ( internal control ) or Slave ( external remote control ) operation.

A. 外部远程控制
B. 内部控制
C. 主控模式
D. 从动模式

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Constant Voltage Mode: Turn the DC CURRENT ADJUST knob fully clockwise. Then adjust the DC VOLTAGE ADJUST knob to obtain the desired output voltage, as indicated on the meter. The output current is displayed on the current meter.

A. 恒压模式
B. 直流电流
C. 顺时针旋转
D. 调节旋钮

Maintenance Fuse Replacement : Try to determine and correct the cause of the blown fuse, then replace only with a fuse of the correct rating and type.

A. 保险丝替换（更换）
B. 维修
C. 保险丝熔断
D. 等级和类型

Main specifications Outputs: regulated for both constant-voltage and constant-current operation. Both current and voltage continuously variable over the range 0 to 24 V DC and 0 to 10 amperes maximum.

A. 电压范围
B. 最大安培值
C. 规格（指标）
D. 电压连续变化

若要盘形凸轮机构的从动件在某段时间内停止不动，对应的凸轮轮廓应是什么曲线？

A. 一段直线
B. 一段圆弧
C. 一段抛物线
D. 以凸轮转动中心为圆心的圆弧