第26169题 单选
以下哪个字典推导式能正确将列表['Python', 'Java', 'C++']转换为{'Python':6, 'Java':4, 'C++':3}(字符串作为键,长度作为值)?
A

{len(x): x for x in ['Python', 'Java', 'C++']}

B

{x: len(x) for x in ['Python', 'Java', 'C++']}

C

{x: x.length() for x in ['Python', 'Java', 'C++']}

D

{x: size(x) for x in ['Python', 'Java', 'C++']}