—________ —This is Alice speaking. A.Who are you?B.Who is this?C.Who is that?D.Are you Alice?
—________ —This is Alice speaking.
A.Who are you?
B.Who is this?
C.Who is that?
D.Are you Alice?
相关考题：
●Alice发送带数字签名的消息共有以下4个步骤，步骤的正确顺序是(56) 。①Alice生成消息摘要 ②Alice生成消息③Alice发送消息 ④Alice利用私钥生成签名(56)A.①②③④B.①②④③C.②①④③D.②①③④
Alice发送带数字签名的消息共有以下4个步骤，步骤的正确顺序是（）。①Alice生成消息摘要 ②Alice生成消息③Alice发送消息 ④Alice利用私钥生成签名A.①②③④ B.①②④③C.②①④③ D.②①③④
提示：爱丽丝的妈妈病了，爱丽丝想向老师格林先生请几天假。Alice:Excuse me.Mr.Green.I′d like to take a few days off.Green:51?Alice:My mother is ill.I have to take care of her.Green:Oh dear!I am sorry to hear that.52？Alice:No.thank you.My mother has caught a bad cold.She has a high fever and coughs day and night.The doctor says my mother has to be in hospital for a few days.I would like to be with her.Green:I understand.53？Alice:I hope to be back next Wednesday.Green:That′s all right.54Alice:Thank you,Mr.Green.That′s very kind of you.I will write it immediately.Green:55第52题答案是
提示：爱丽丝的妈妈病了，爱丽丝想向老师格林先生请几天假。Alice:Excuse me.Mr.Green.I′d like to take a few days off.Green:51?Alice:My mother is ill.I have to take care of her.Green:Oh dear!I am sorry to hear that.52？Alice:No.thank you.My mother has caught a bad cold.She has a high fever and coughs day and night.The doctor says my mother has to be in hospital for a few days.I would like to be with her.Green:I understand.53？Alice:I hope to be back next Wednesday.Green:That′s all right.54Alice:Thank you,Mr.Green.That′s very kind of you.I will write it immediately.Green:55'第53题答案是
Alice向Bob发送消息时，签名者Alice可以使用（）生成该消息的签名。A．Alice的公钥B．Alice的私钥C．Bob的公钥D．Bob的私钥