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【简答题】
访问控制技术包含三个要素_______、_________和___________。
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反馈参考答案：
举一反三
【单选题】Why was the little prince angry at "me"?
A.
Because "I" was busy with repairing the engine
B.
Because "I" killed the sheep.
C.
Because "I" destroyed his joy
【简答题】有一二端网络，用一内阻为10^5Ω的电压表测得其端电压为45V，若换用一内阻为5*10^4Ω的电压表来测，则测得的端电压为30V，则该网络端电压的真实数值为( )V。
【单选题】有一二端网络，用一内阻为【图片】的电压表测得其端电压为45V，若换用一内阻为【图片】的电压表来测，则测得的端电压为30V，则该网络端电压的真实数值为（ ）。
A.
45V
B.
30V
C.
90V
D.
60V
【单选题】Why was the little prince angry at "me"?
A.
Because "I" was busy with repairing the engine.
B.
Because "I" killed the sheep.
C.
Because "I" destroyed his toy.
【简答题】Why
was the little girl not panicked?A. Because she was blind and deaf. B. Because she didn't hear the grave news. C. Because she was too small to know anything. D. Because she was fixed and intent on...
【简答题】计算题：有一个直流有源二端网络，用内电阻 R′ b ＝50kΩ的电压表测得它两端的电压Uab＝100V，用内电阻为R″ b ＝150kΩ的电压表测得它两端的电压U ab ＝150V，求这个网络的等效电压源E 0 和R 0 。
【简答题】如图1-93所示电路,开路时测得某直流电源端电压为24V,接上外接电阻R后,用电压表测得R两端电压为20V,用电流表测得流经R的电流I=10A,求电阻R及电源内阻Rs。
【单选题】Why was the little boy disappointed?
A.
He couldn’t get a football shirt from Messi.
B.
His family was too poor to buy him a football.
C.
He couldn’t get a football shirt to look like Messi.
D.
His family cannot afford to pay for football lessons.
【单选题】Why was the little boy disappointed?
A.
He couldn’t get a football shirt from Messi.
B.
He couldn’t get a football shirt to look like Messi.
C.
His family was too poor to buy him a football.
D.
His family cannot afford to pay for football lessons.
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