【简答题】请写出重力场中质量力势函数的表达式?并说明式中各符号的意义!
【单选题】执行以下代码段的输出是:( ) names1 = ['Amir', 'Barry', 'Chales', 'Dao'] if 'amir' in names1: print (1) else: print (2)
【简答题】执行代码: >>> names = ['zhu', 'wang', 'li', 'xie'] >>> cap_names = [n.capitalize() for n in names]>>> cap_names 执行后的结果是:A. ['zhu', 'wang', 'li', 'xie'] B. ['ZHU', 'WANG', 'LI', 'XIE'] C. ('zhu', 'wang', '...
【单选题】执行以下代码段的输出是:( ) names1 = ['Amir', 'Barry', 'Chales', 'Dao'] names2 = names1 names3 = names1[:] names2[0] = 'Alice' names3[1] = 'Bob' sum = 0 for ls in (names1, names2, names3): if ls[0] == 'Alice': su...
【判断题】创新始终是一个国家、一个民族发展的重要力量,也始终是推动人类社会进步的重要力量。
【单选题】执行以下代码段的输出是:( ) names1 = ['Amir', 'Barry', 'Chales', 'Dao'] names2 = [name.lower() for name in names1] print(names2[1][0])