单项选择题st={ name : xxx , emails :[ a@123.com , b@123.com ], age :20} del st[ emails ][0] st[ emails ].append( c@123.com ) del st[ age ] print(st) 结果是
A.{'name': 'xxx', 'emails': ['a@123.com','b@123.com', 'c@123.com']}
B.{'name': 'xxx', 'emails': ['a@123.com','a@123.com', 'c@123.com'],"age":20}
C.{'name': 'xxx', 'emails': ['a@123.com','a@123.com', 'c@123.com']}
D.{'name': 'xxx', 'emails': ['b@123.com', 'c@123.com']}