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【单选题】
设 X~N(1,4) ,且 Φ(0.3)=0.6179, Φ(0.5)=0.6915 ,则 P(0 = ( )A.
0.3094
B.
0.1457
C.
0.3541
D.
0.2543
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举一反三
【单选题】对于电流放大，希望放大电路的输入电阻________，对于电压放大，希望放大电路的输入电阻________。
A.
越大越好，越大越好
B.
越小越好，越小越好
C.
越大越好，越小越好
D.
越小越好，越大越好
【单选题】In spite of all your () ; there may be times when you encounter difficulties in the training process.
A.
prestige
B.
dedication
C.
endeavors
【单选题】In spite of all your ( ) ; there may be times when you encounter difficulties in the training process.
A.
prestige
B.
maintain
C.
endeavors
【简答题】In spite of all your____be times when you encounter difficulties in the training process.
【单选题】In spite of all your ; there may be times when you encounter difficulties in the training process.
A.
prestige
B.
nomination
C.
endeavors
【单选题】In spite of all your ( ), there may be times when you encounter difficulties in the training process.
A.
prestige
B.
whereby
C.
endeavor
D.
pursuit
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