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【单选题】
下列关于异相睡眠期的描述,错误的是
A.
眼球快速运动;
B.
脑内蛋白质合成加快;
C.
生长素分泌明显升高;
D.
有利于建立新的突触联系;
E.
脑电图呈现去同步化快波;
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A.
A=I
B.
A=-B
C.
A=B
D.
AB≠BA
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A.
Yes, Im not.
B.
Yes, I am.
C.
No, I'm not.
D.
No, I am.
【单选题】设A和B均为n×n矩阵,则必有 A.|A+B|=|A|+|B|.
B.
AB=BA.
C.
|AB|=|BA|.
D.
(A+B)-1=A-1+B-1.
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A.
Yes, I am
B.
Yes, I'm not
C.
No, I'm not
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【判断题】计算元件功率不能使用叠加定理。A. √ B. ×
A.
正确
B.
错误
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