A.with open(file,’r’)as f:content =f read()B.file.read()C.open(file,’r’).read()D.A和C都對
A.variable is NoneB.variable ==NoneC.variable ===NoneD.A和B都對
A.@decorator def func():passB.def func()decorator:passC.func =decorator(func)D.A和C都對