公钥密码体制有两种基本的模型:加密模型和______。
参考答案:认证模型
解析:
[分析]: 公钥密码体制有两种基本的模型,一种是加密模型,另一种是认证模型。
针对某设计项目建立质量目标,规定质量要求和安排应开展的各种活动被称为( )。
A.设计方案B.设计计划C.设计策划D.设计文件
用所给词的适当形式填空。
1. Are you going to exercise_______ (much) or less this year?
2. Many_______ (read) are interested in the story.
3. There are a lot of _______ (build) in our city in a few years.
4. —Do you have any plan about your future?
—I am going_______ (be) a teacher when I grow up.
5. —Meimei, can you play tennis with me this afternoon?
—Sorry, I am_______ (go) shopping.