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【判断题】
研究“人”的三大能力有察己、筑梦、自省。()A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
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A.
Un不变，转速n增大，控制电压Uc增大。
B.
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C.
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D.
Un减小，转速n不变，控制电压Uc不变。
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