已知|－1－i|＝a＋(a2－3a＋2)i，则实数a的值为[ ]
举一反三
- 已知 vec = [[1,2], [3,4]],则表达式 [[row[i] for row in vec] for i in range(len(vec[0]))]的值为______________()_________。[/i] A: [1, 2, 3, 4] B: [[1, 2, 3], 4] C: [[1, 3], [2, 4]] D: [1, 2, [3, 4]]
- 已知列表 list1 = [1, 2, 3],那么执行语句[list1.append('ii') for ii in range(1,5,2)]之后,list1的值为________。() A: [1, 2, 3, 'i', 'i'] B: [1, 2, 3, 'ii', 'ii'] C: [1, 2, 3, 1, 3] D: [1, 2, 3, '1', '3']
- Python 表达式[i for i in range(5) if i%2!=0]的值为__1__,[i**2 for i in range(3)]的值为__2__。
- 已知 vec=[[1,2],[3,4]],则表达式［［row[i] for row in vec] for i in range(len(vec[0]))]的值为（ )[/i]
- 已知列表m=[[1,2],[3,4]]，有列表a=[[row[i] for row in m] for i in range(2)]，则a[0][1]是[/i]