已知工频正弦电压有效值和初始值均为380[tex=0.643x1.0]SW0o8G0GHsmLXldwnq7xKg==[/tex],则该电压的瞬时值表达式为( )
未知类型:{'options': ['[tex=7.071x1.0]HdwR2arLCF+hUcSvQ8tVBhtPOWEtDVSh4w6LKgbDqjc=[/tex]', '[tex=10.143x1.357]Cc733IMCETcvDssSoLc97+5QB6uARbKxi0NgZKCuhOezhisoUKicxsPOMhqH0Is6oPTdZq7ZXLirNpact36IiQ==[/tex]', '[tex=10.143x1.357]4fZerrOsdbKtCqPAogsypY0IMQIeKWgm6hzb/yhV0K4qDC4yCPtUa0aj6xusNe3dVciasfd239EttaRinfxVDw==[/tex]'], 'type': 102}
未知类型:{'options': ['[tex=7.071x1.0]HdwR2arLCF+hUcSvQ8tVBhtPOWEtDVSh4w6LKgbDqjc=[/tex]', '[tex=10.143x1.357]Cc733IMCETcvDssSoLc97+5QB6uARbKxi0NgZKCuhOezhisoUKicxsPOMhqH0Is6oPTdZq7ZXLirNpact36IiQ==[/tex]', '[tex=10.143x1.357]4fZerrOsdbKtCqPAogsypY0IMQIeKWgm6hzb/yhV0K4qDC4yCPtUa0aj6xusNe3dVciasfd239EttaRinfxVDw==[/tex]'], 'type': 102}
举一反三
- 假设所有变量均为整型, 则表达式[tex=10.571x1.357]LwbIklUNi3bG92VfuhR/2s2h8bPim4KlwMHG5pBJ+3PKMuWS/4OGtcmSMjC2vxzVyrIKC8OVgBRFsqcS0s1A1u2X9g+VlWD58VLIpTfy7/0=[/tex]后[tex=0.571x0.786]FLCxr+5eRIYnIT0kyTRrXg==[/tex]的值为 未知类型:{'options': ['7', '8', '6', '2'], 'type': 102}
- set1 = {x for x in range(10) if x%2==0} print(set1) 以上代码的运行结果为? A: {0, 2, 4, 6} B: {2, 4, 6, 8} C: {0, 2, 4, 6, 8} D: {4, 6, 8}
- set1 = {x for x in range(10)} print(set1) 以上代码的运行结果为? A: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} B: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10} C: {1, 2, 3, 4, 5, 6, 7, 8, 9} D: {1, 2, 3, 4, 5, 6, 7, 8, 9,10}
- >>>x= [10, 6, 0, 1, 7, 4, 3, 2, 8, 5, 9]>>>print(x.sort()) 语句运行结果正确的是( )。 A: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10] B: [10, 6, 0, 1, 7, 4, 3, 2, 8, 5, 9] C: [10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0] D: ['2', '4', '0', '6', '10', '7', '8', '3', '9', '1', '5']
- 采用基2时间抽取FFT算法流图计算8点序列的DFT,第一级的数据顺序为 A: x[0],x[2],x[4],x[6],x[1],x[3],x[5],x[7] B: x[0],x[1],x[2],x[3],x[4],x[5],x[6],x[7] C: x[0],x[4],x[2],x[6],x[1],x[5],x[3],x[7] D: x[0],x[2],x[1],x[3],x[4],x[6],x[5],x[7]