问题 填空题

如果某事务成功完成执行,则该事务称为______事务。

答案

参考答案:已提交

解析: 成功完成执行的事务称为已提交事务。已提交事务使数据库进入一个新的一致状态,即使出现系统故障,这个状态也必须保持。未能完成的事务称为中止事务,中止事务必须对数据库的状态不造成影响,即中止事务对数据库所做的任何改变必须撤销。一旦中止事务造成的变更被撤销,则称事务已回滚。

阅读理解

Microblog is used by more and more people in China. Do you know what it is?

Micorblog makes the people around the world know each other better. It helps people to find the information that they need more easily, also to get some information about the world they did not know before.

Many famous people are using microblog now, including singers, TV hosts and artists. The first day of Chinese New Year in 2013, people on Sina Microblog sent 9,873 microblogs to wish somebody a Happy New Year. Yao Chen, a movie star, became the queen of microblog because her microblog had over 1.3 million followers; Li Yuchun sent a microblog and got 11,760 comments (评论) within 24 hours; Cai Kangyong, who is a famous TV host and famous writer in Taiwan, had 15,143 followers within 24 hours.

Why is microblog so popular? The most important reason is that it is easy. People need not use too much time to write the articles to express their feelings. They can write at most 140 words, and then send them through computers or mobile phones onto the microblog. As soon as they send it out, their fans will know. They can send it out anytime, anywhere.

Many of my friends use microblogs to share things with others. They can talk about what they see, hear and think in a sentence or a photo. Also, they can follow their friends’ or their favorite stars’. They can even join in any discussion of anything. Microblog is a hit now! Have you microblogged today?  264

小题1:According to the passage, ______.

A.microblog can make people know each other better

B.you can write as many words as you like in microblog

C.microblog is not very popular in China

D.microblog is only used by people under 18小题2:Microblog is very popular. The most important reason is that _____.

A.many famous people are using it now

B.it is easy, quick and very useful

C.people can share their photos with others

D.people can join in any discussion小题3:The word “hit” in the 5th paragraph means _____.

A.important information and comments

B.somebody interesting and helpful

C.something popular and successful

D.famous people and movie stars

单项选择题