已知list1=list("php"),执行语句list1[2:]=list("Python")后,列表list1中的内容为?( )
['p','h','p','P','y','t','h','o','n']
['p','P','y','t','h','o','n']
['p','h','P','y','t','h','o','n']
['P','y','t','h','o','n']