设 [tex=8.571x1.286]mM9SUkLQpjfzMGywWIx/DeHVhdIIhjzA/Z1SfBbiatqkLw40SZ8OWgxAwRvV/drUGk4bHEbtBD3ttZcrmtpRGA==[/tex] 是4阶矩阵， [tex=1.286x1.286]irGVtP+pr8+aYC1RRf4xn3MhK08StbnjWJkJlEAZbKI=[/tex] 为 [tex=0.857x1.286]VDaqe/5gsI6W8PDnV4Qzpg==[/tex] 的伴随矩阵。若[tex=5.786x1.286]m3gkpW7NC1i8Hfg2Pyci4dC6wzFts+aplCknjz0onvE=[/tex]是方程组 [tex=3.286x1.286]YrwT+5YoKel1o52jpp9bsAf8ull+e2ipTmSvXzqtFKE=[/tex] 的一个基础解系，则 [tex=3.786x1.286]WUw39s2jXeNzWzwaexuMHadqOfS21V/oRQa/kouXrWE=[/tex] 的一个基础解系可为（  ）。 未知类型：{'options': ['[tex=2.571x1.286]uqQjr+1fdzrGc/pjVlHJ5ztd8ryrtblqvWfiRLT3dm8=[/tex]', '[tex=2.571x1.286]uqQjr+1fdzrGc/pjVlHJ58BTePeb3ayXF59eJTI5M6I=[/tex]', '[tex=4.0x1.286]uqQjr+1fdzrGc/pjVlHJ575WcdTSBuwQQIuO0t1a2zM=[/tex]', '[tex=4.071x1.286]xfgjR51UV4izS+2pinYPYnwRsFur2H0/iLbqLScUgew=[/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）

设向量组I：[tex=5.286x1.286]uqQjr+1fdzrGc/pjVlHJ57cLVzRsvUu0sBikhtMh2EfhDl+lFiHW0wM5N92rOMuN[/tex]可由向量组II：[tex=5.786x1.286]RfIG58+n8utfIs9Kl9aUld+piyYfzLZgWvVFoj3aaDBj3WjSc4gM22NCDyfHzZoD[/tex]线性表出，下列命题正确的是 未知类型：{'options': ['若向量组I线性无关，则[tex=2.286x1.286]gMf1ZjyWB0CEUN36G3Is/Q==[/tex]', '若向量组I线性相关，则[tex=2.286x1.286]VbMMduHd9z+sEgkjVNnhyQ==[/tex]', '若向量组II线性无关，则[tex=2.286x1.286]gMf1ZjyWB0CEUN36G3Is/Q==[/tex]', '若向量组II线性相关，则[tex=2.286x1.286]VbMMduHd9z+sEgkjVNnhyQ==[/tex]'], 'type': 102}

共有四个站进行码分多址CDMA通信。四个站的码片序列为：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) , 现在收到这样的码片序列：（-1 -1 +1 +1 +3 +3 -1 -1 ）