曳引钢丝绳的公称直径不小于()mm；钢丝抗拉强度：对于单强度钢丝绳宜为()MPa A.6；1670；1770 B.8；1570；1770 C.8；1570；1770 D.6；1570；1670

低碳钢焊接时熔池平均温度约1770±100K

以下代码的输出结果是（ ）ls = [“2020”,”1903”,”Python”]ls.append(2050)ls.append([2020,”2020”])print(ls) A: [‘2020’,’1903’,’Python’,2020,[2050,’2020’]] B: [‘2020’,’1903’,’Python’,2020] C: [‘2020’,’1903’,’Python’,2050,[2020,’2020’]] D: [‘2020’,’1903’,’Python’,2050,[‘2020’]]

阅读以下程序，其运行结果为（ ） ls=['2020','1903','Python'] Is.append(2050) Is.append([2020,'2020']) print(ls) A: ['2020', '1903', 'Python', 2050, 2020, '2020'] B: ['2020', '1903', 'Python', 2050, [2020, '2020']] C: ['2020', '1903', 'Python', 2050] D: ['2020', '1903', 'Python', 2050, [ '2020']]

莱特兄弟1903

Altogether she wrote ________ poems. A: 1775 B: 1773 C: 1778 D: 1770

In 1903, an American Henry Adams is stra... and .

In 1903, an American Henry Adams is stra... and .

Britain's first permanent colony was founded in ______. A: 1606 B: 1770 C: 1787 D: 1788

《第六交响曲“田园”》创作于哪一年 A: 1770 B: 1791 C: 1808 D: 1827