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【单选题】
以下关于数字签名的叙述中，错误的是______。A.
数字签名能够确认签名者的身份
B.
数字签名能够保证数据的完整性
C.
数字签名具有不可否认性
D.
数字签名由公钥生成
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【简答题】(三) How to Make Friends Friendship is a very important human relationship and everyone needs good friends. Good friendship has many benefits. It offers companionship (陪伴) , improves self-worth and pro...
【简答题】测量水平角时,用十字丝的中丝瞄准目标。 ____
【多选题】How to Make Friends Friendship is a very important human relationship and everyone needs good friends. Good friendship has many benefits. It offers companionship, improves self-worth and promotes good...
A.
Be cheerful.
B.
Do things together.
C.
Do not wait to be spoken to.
D.
Try not to find fault with your friends.
E.
Making new friends comes easy for some people.
F.
For a friendship to develop you need to stay in touch.
G.
So you will need to give your friend time to react to you.
【单选题】Which one is TRUE about the author?
A.
He thinks the Friendship Height law is just a stunt.
B.
He is careless about the law.
C.
He thinks that although it is not bad to set up such laws. the law-makers must think about it practically
D.
He is optimistic about the law's being carried.
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