【简答题】给手机sim卡加密的密码叫做______码,给电脑硬盘加密的方式叫做_______,两者可以在最坏的情况下给数据一份保障。(字母小写)
【单选题】After the rich man heard the touching story, he _____ most of his money to charity. [ ]
【单选题】After the rich man heard the touching story, he________ most of his money to charity.
【简答题】支持交易后的电子商务系统的技术特点是什么?
【单选题】—Jack used to give most of his money to people in trouble. How do you like him? —Some thinks he might be kind of _______. But more people are grateful to him.
【单选题】Most of the students ___ boys. Most of his money ___ spent on books.
【多选题】乙酸乙酯制备实验中,在反应体系中必须加入少量浓硫酸,其作用是( )?
【简答题】支持交易中的电子商务系统的技术特点是什么?