以下程序的输出结果：（ ） A: <;class 'dict'>;<;class 'dict_values'>;<;class 'dict_keys'>; B: <;class 'dict'>; C: <;class 'dict'>;<;class 'dict'>;<;class 'dict'>; D: <;class 'dict'>;NoneNone

使用字典的( )方法得到所有键作为元素的列表，实现字典中所有键的遍历。 A: keys() B: items() C: values() D: dict()

In the key layering hierarchy, which of the following keys may be classified based on longer-term keys considerations? ___. A: key-encrypting keys B: session keys for single communications session C: keys established by key agreement D: keys established by key transport

Which of the following keys should be stored in an archive even after expiration? A: Private authentication keys B: Public encryption keys C: Private signature keys D: Public verification keys

dict={'1':1,'2':2} theCopy=dict dict['1']=5 sum=dict['1']+theCopy['1'] print(sum)

字典中添加元素（ ）。 A: DICT[3]=(1,2,3) B: DICT['4]=6:3 C: DICT[2]=2 D: DICT['1']=1

以下能正确的创建字典的是() A: dict={}.fromkeys((1,2)) B: dict={a:1,b:2,c:3} C: dict={{1,2}:1} D: dict=dict([1,2],[3,4])

优学院: Eddie: Whose keys are these? Kyle: Those keys ____ to Mike.

Which one of the following is not true about dictionary keys? ( ) A: Keys must be immutable B: Keys must be integers C: When duplicate keys encountered, the last assignment wins D: More than one key is not allowed

(单选题, 0.2分)以下不能创建一个字典的语句是（ ） A: dict={} B: dict={(4,5,6):'dictionary'} C: dict={4:6} D: dict={[4,5,6]:'dictionary'}