2021 год объявлен в России ______ [Год науки и технологий].
举一反三
- ls = ['2021', '20.21 ', 'Python'] ls.append(2021) ls.append([2021, '2021']) print(ls) A: ['2021', '20.21 ', 'Python', 2021, 2021, '2021'] B: ['2021', '20.21 ', 'Python', 2021] C: ['2021', '20.21 ', 'Python', 2021, [2021, '2021']] D: ['2021', '20.21 ', 'Python', 2021, ['2021']]
- 运行下面程序, 代码的执行结果是( )。 ls = [2021, 20.21, "py"] ls.append("2022") print(ls) A: [2021, 20.21, 'py'] B: [2021, 20.21, 'py', '2022'] C: ['2021', '20.21', 'py', 2022] D: ['2022', '20.20', 'py', 2021]
- HTML5的基本结构是( ) 未知类型:{'options': ['[html][body][/][head][/][/]', '[html][head][/][body][/][/]', '[html][head][/][foot][/][/]', '[html][head][title][/][/][/]'], 'type': 102}
- a=array([[0,1,2,3], [4,5,6,7], [8,9,10,11], [12,13,14,15]]) b=array([[16,17,18,19], [20,21,22,23], [24,25,26,27], [28,29,30,31]]) 通过语句np.concatenate((a,b),axis=1)可以产生 array([[0,1,2,3,16,17,18,19], [4,5,6,7,20,21,22,23], [8,9,10,11,24,25,26,27], [12,13,14,15,28,29,30,31]])
- p>[span][span]一般来说,材料的[/][/][span]HB[/][span][span]指标越[/][/][span][span]低[/][/][span][span],[/][/][span][span]其[/][/][span][span]耐磨性越好。[/][/][br][/br]</p