更多"[单选题]-I'm sorry. Bob is not in his "的相关试题:
[简答题] I am very familiar with his name.
[简答题] I am not satisfied with his answer.
[单选题]Alice 用 Bob 的密钥加密明文,将密文发送给 Bob。Bob 再用自己的私钥解密,恢复出明文。以下说法正确的是:
A.此密码体制为对称密码体制
B.此密码体制为私钥密码体制
C.此密码体制为单钥密码体制
D.此密码体制为公钥密码体制
[单选题]若Bob给Alice发送一封邮件，并想让Alice确信邮件是由Bob发出的，则Bob应该选用（）对邮件签名。
A.Alice的公钥
B.Alice的私钥
C.Bob的公钥
D.Bob的私钥
[单选题] She his number in the phone book to make sure that she had got it right.
A. looked up
B. looked for
C. picked out
D. picked up
[简答题] I knocked on his door but nobody came to answer it.
[单选题]- I'm afraid I can't go to your party,I have an important exam tomorrow. ______
A. What a pity
B. With pleasure
C. No problem
D. Mind yourself
[单选题] I don’t trust him at all. His smiles always make me .
A. feeling sick
B. be sick
C. being sick
D. sick
[单选题]-Marilyn, I' m afraid I have to be leaving now. ______
A.That sounds wonderful.
B. Oh, so early?
C. Not all.
D. Good luck
[单选题]—I'm sorry. I am late due to the heavy traffic. ______
A. Well, It's OK
B. No,it' s all right
C. You are welcome
D. You are wrong
[单选题] 若 Bob 给 Alice 发送一封邮件, 并想让 Alice 确信邮件是由 Bob 发出的, 则 Bob 应该选 用( )对邮件加密。
A. Alice 的公钥
B. Alice 的私钥
C. Bob 的公钥
D. Bob 的私钥
[简答题] I can't go with you today because I'm too busy.
[单选题]I often see _______the road on his way home.
A. he cross
B. him cross
C. him crossed
D. he crossing
[单选题] I’m afraid I will have to_______ her invitation to the party.
A.refuse
B.refute
C.ignore
D.decline
[单选题]-I' m sorry. I lost the key. ______
A. Well, it's OK
B. No, its’ all right
C. You are welcome
D. You are wrong
[简答题] I'm telling the truth.
