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转速电流双闭环速度控制系统中转速调节为PID调节器时转速总有超调。（） A. 对 B. 错

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戴玉佩的传统是，男戴观音女戴什么？

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单项选择题

Why does the Queen finally compromise and air her condolences in public?
A、 Because the press have run wild.
B、 Because her son leaves her no choice.
C、 Because Tony Blair exerts too much pressure on her.
D、 Because she realizes that modernization is inevitable.