设级数[tex=2.714x2.714]ySadpvq7BrEZCGdcnD6+aevQSiUapl3qI6D/1lvgJVQ=[/tex]收敛，则必收敛的级数为 未知类型：{'options': ['[tex=5.286x2.714]ySadpvq7BrEZCGdcnD6+accVJN9KPzp1hjdpBe2PW5H1wwUmk7+OzNiL2Av08Ga3MNMzLZdxW2rPx8Xu0riSTg==[/tex]', '[tex=2.714x2.714]ySadpvq7BrEZCGdcnD6+acmJvIfh2uCX8dO8NRr4G3EgRGUHA/Qc7jf0ksOcNO+D[/tex]', '[tex=7.5x2.714]ySadpvq7BrEZCGdcnD6+acpCuist9iyX+/cOGxFe02z0HwrmPXVeKCxW98OAPoe5FK+JT8YnrYnjDo0gD2qY5Q==[/tex]', '[tex=6.714x2.714]ySadpvq7BrEZCGdcnD6+aUSs8NjqGM34Pj0L/aWjPf66+/w82GQur4sqKPd1Z3pbUhADuGmasFe+dg7T+191TQ==[/tex]'], 'type': 102}

若级数[tex=2.714x2.714]ySadpvq7BrEZCGdcnD6+aevQSiUapl3qI6D/1lvgJVQ=[/tex]收敛，则下列级数中收敛的是[input=type:blank,size:6][/input] . 未知类型：{'options': ['[tex=6.071x2.714]ySadpvq7BrEZCGdcnD6+aUSs8NjqGM34Pj0L/aWjPf772dbvk2QiSp7dpZ7/MAB/[/tex]', '[tex=6.071x2.714]ySadpvq7BrEZCGdcnD6+aUSs8NjqGM34Pj0L/aWjPf5gD082w4ii+e+OqGCOiJxW[/tex]', '[tex=4.143x2.714]ySadpvq7BrEZCGdcnD6+aU4qHJeokQihJ889W6SoMTMNic2Q0WF4HG183yVB6bRm[/tex]', '[tex=6.143x2.714]ySadpvq7BrEZCGdcnD6+aSBPXJbZEuHno1IyUm3MXawCF8vRFcwHVVo/h7fl237cWbwsu4EidIs3G9PvuqJk8A==[/tex]'], 'type': 102}

设正项级数[tex=2.714x2.714]ySadpvq7BrEZCGdcnD6+aevQSiUapl3qI6D/1lvgJVQ=[/tex]收敛，则下列级数中，一定收敛的是[input=type:blank,size:6][/input] . 未知类型：{'options': ['[tex=5.286x2.714]ySadpvq7BrEZCGdcnD6+aUSs8NjqGM34Pj0L/aWjPf5nwpc8Gxc46klh+uULINYq[/tex][tex=4.786x1.286]0IqZGXsQumQ8HVtPWCATrtiJCBHUv8/DIKQIwjftTCI=[/tex]', '[tex=3.571x2.714]ySadpvq7BrEZCGdcnD6+aSrhkX13cc9+5wstZa/wdPBrtZqNaznOw9czyCs260T4[/tex]', '[tex=2.929x2.714]ySadpvq7BrEZCGdcnD6+aXdjt7olXa1sOQ/uQAnHb9YfMOOvt9w4M+ygFFPEXpM3[/tex]', '[tex=5.071x2.714]ySadpvq7BrEZCGdcnD6+aXJu218uJmjxWnvA5oEiEDTma8mLHGCbClj8X9wIEyr2[/tex]'], 'type': 102}

for i in range(b.max_row): for j in range(b.max_column): print(b.cell(row=i,column=j).value)上面语句运行的结果是：__________。 A: 1 1 1 1 1 1 1 1 1 1 B: 1111111111 C: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D: 出现异常

【单选题】CDMA通信的基站,假定基站A的码片序列是+1 +1 +1 -1 -1 +1 -1 -1,基站发射bit为101时,实际发射的信号是 A. +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 –1 –1 –1 +1 +1 –1 +1 +1 B. +1 +1 +1 -1 -1 +1 -1 -1 –1 –1 –1 +1 +1 –1 +1 +1 +1 +1 +1 -1 -1 +1 -1 -1 C. +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 D. –1 –1 –1 +1 +1 –1 +1 +1 –1 –1 –1 +1 +1 –1 +1 +1 –1 –1 –1 +1 +1 –1 +1 +1

for i in range(1,11): for j in range(1,11): b.cell(row=i,column=j).value=1 #b是一个工作表对象for i in range(1,11): for j in range(1,11): print(b.cell(row=i,column=j).value,end=" ") print()上面程序代码运行的结果是（）。 A: 1 B: 1 1 1 1 1 1 1 1 1 1 C: 1111111111 D: 1 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 1

下列哪个码片序列不能用于CDMA通信 A: ( -1 -1 -1 +1 +1 -1 +1 +1 ) B: ( -1 -1 +1 -1 +1 +1 +1 -1 ) C: ( -1 +1 -1 +1 +1 -1 -1 -1 ) D: ( -1 +1 -1 -1 -1 -1 +1 -1 )

请仔细观察下面行列式的计算过程，如果四个等号都理解了，请选择A，否则请选择B。 | a 1 1 1 1 | |a＋4 a＋4 a＋4 a＋4 a＋4| | 1 a 1 1 1 | | 1 a 1 1 1 | | 1 1 a 1 1 |= | 1 1 a 1 1 | | 1 1 1 a 1 | | 1 1 1 a 1 | | 1 1 1 1 a | | 1 1 1 1 a | | 1 1 1 1 1 | | 1 a 1 1 1 | =(a＋4) | 1 1 a 1 1 | | 1 1 1 a 1 | | 1 1 1 1 a | | 1 1 1 1 1 | | 0 a–1 0 0 0 | =(a＋4) | 0 0 a–1 0 0 | | 0 0 0 a–1 0 | | 0 0 0 0 a–1 | =(a＋4)(a–1)^4

共有4个站进行码分多址通信。4个站的码片序列为：a：（-1 -1 -1 +1 +1 -1 +1 +1） b：（-1 -1 +1 -1 +1 +1 +1 -1） c：（-1 +1 -1 +1 +1 +1 -1 -1） d：（-1 +1 -1 -1 -1 -1 +1 -1） 现收到这样的码片序列：（-1 +1 -3 +1 -1 -3 +1 +1），则（ ）发送1。

共有四个站进行CDMA通信，现收到这样的码片序列（-3 +1 -1 -1 +1 +1 +1 -3），则下列站点发送了数据1的是（ ） A: （-1 -1 -1 +1 +1 -1 +1 +1） B: （-1 -1 +1 -1 +1 +1 +1 -1） C: （-1 +1 -1 +1 +1 +1 -1 -1） D: （-1 +1 -1 -1 -1 -1 +1 -1）