• 2021-04-14 问题

    在某演艺界大奖评选中,演员中有人入围了最佳男主角。已知上述命题为真,则下列不能确定真假的是()   ①所有演员都入围了最佳男主角   ②LYF入围了最佳男主角   ③演员中有人没入围最佳男主角   ④演员中没有人入围最佳男主角

    在某演艺界大奖评选中,演员中有人入围了最佳男主角。已知上述命题为真,则下列不能确定真假的是()   ①所有演员都入围了最佳男主角   ②LYF入围了最佳男主角   ③演员中有人没入围最佳男主角   ④演员中没有人入围最佳男主角

  • 2021-04-14 问题

    在某演艺界大奖评选中,演员中有人入围了最佳男主角。已知上述命题为真,则下列不能确定真假的是()   ①所有演员都入围了最佳男主角   ②LYF入围了最佳男主角   ③演员中有人没入围最佳男主角   ④演员中没有人入围最佳男主角: ①②③|①②③④|②③④|只有④

    在某演艺界大奖评选中,演员中有人入围了最佳男主角。已知上述命题为真,则下列不能确定真假的是()   ①所有演员都入围了最佳男主角   ②LYF入围了最佳男主角   ③演员中有人没入围最佳男主角   ④演员中没有人入围最佳男主角: ①②③|①②③④|②③④|只有④

  • 2022-07-24 问题

    氮放电管发出的光垂直照射到某光栅上, 测得波长[tex=5.429x1.214]wacB2ckJHjFg/rzvTKB4QwF8iKtwuOrIAFydxWNUk+cAgjnH6MZtCp2CpsB1/Knd[/tex] 的谱线的衍射角为[tex=2.429x1.214]ZgHCLdC+mFB4Qsb7x2w4NA==[/tex]如果在同样[tex=0.714x1.0]G0EINCSU/4flqLNUikAogg==[/tex] 角处出现波长 [tex=5.429x1.214]pQMIIiv1lyF/JtH93/xwSzDaxN1/Dy4wfyo6KFOCwS0ST7Cq+BLx+uFD+41hFpvn[/tex] 的更高级次的谱线, 那么光栅常数最小是多少?

    氮放电管发出的光垂直照射到某光栅上, 测得波长[tex=5.429x1.214]wacB2ckJHjFg/rzvTKB4QwF8iKtwuOrIAFydxWNUk+cAgjnH6MZtCp2CpsB1/Knd[/tex] 的谱线的衍射角为[tex=2.429x1.214]ZgHCLdC+mFB4Qsb7x2w4NA==[/tex]如果在同样[tex=0.714x1.0]G0EINCSU/4flqLNUikAogg==[/tex] 角处出现波长 [tex=5.429x1.214]pQMIIiv1lyF/JtH93/xwSzDaxN1/Dy4wfyo6KFOCwS0ST7Cq+BLx+uFD+41hFpvn[/tex] 的更高级次的谱线, 那么光栅常数最小是多少?

  • 2022-07-24 问题

    以氯放电管发出的光垂直照射到某光栅上,测得波长[tex=4.0x1.214]wacB2ckJHjFg/rzvTKB4QxdO2uTDanyb5XjlG9rebic=[/tex][tex=1.5x1.0]FeM5JKtECm9zX482D7vGOw==[/tex]的谱线的衍射角为[tex=2.857x1.286]3pcOhMICisRdH/fWZ2jJezfC6dBP17lk8DDs/SmZ1qw=[/tex].如果在同样[tex=0.714x1.0]y9ABqRCnjQW6yIa1BUBRPA==[/tex]角处出现波长[tex=5.5x1.214]pQMIIiv1lyF/JtH93/xwS2wpwsFP/HA0cpHeKa1whhY=[/tex]的更高级次的谱线,那么光栅常数最小为多少?

    以氯放电管发出的光垂直照射到某光栅上,测得波长[tex=4.0x1.214]wacB2ckJHjFg/rzvTKB4QxdO2uTDanyb5XjlG9rebic=[/tex][tex=1.5x1.0]FeM5JKtECm9zX482D7vGOw==[/tex]的谱线的衍射角为[tex=2.857x1.286]3pcOhMICisRdH/fWZ2jJezfC6dBP17lk8DDs/SmZ1qw=[/tex].如果在同样[tex=0.714x1.0]y9ABqRCnjQW6yIa1BUBRPA==[/tex]角处出现波长[tex=5.5x1.214]pQMIIiv1lyF/JtH93/xwS2wpwsFP/HA0cpHeKa1whhY=[/tex]的更高级次的谱线,那么光栅常数最小为多少?

  • 2022-06-01 问题

    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

    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

  • 2021-04-14 问题

    【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

    【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

  • 2022-06-01 问题

    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

    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

  • 2022-10-25 问题

    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 )

    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 )

  • 2021-04-14 问题

    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

    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

  • 2021-04-14 问题

    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。

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