题目内容

对于并发控制描述正确的是()

A. 在多个用户同时使用数据库时需要用到并发控制机制
B. 并发控制能够使多用户共享数据时保证不产生冲突和矛盾,保证数据的一致性
C. 封锁机制是并发控制的常用方法
D. 并发控制可能带来数据冗余的问题

查看答案
更多问题

Language Focus1. Complete the following sentences with the proper words and expressions.(填大写字母)A.roughly B. dramatic C. loomsD. exotic E. experiment F.capturesG. striking H. outreach I. tower over J. adopted K.immense L. shaded1) The coming examination ________ larger with every passing day.2) The novel ________ the imagination of thousands of readers.3) It’s almost impossible to find him in the ________ ocean.4) ________ speaking, I would say that about 100 people attended the exhibit.5) There were some ________ similarities between the two books. 6) New methods of teaching foreign languages are ________ in this institute.7) The conversation stopped when she made her ________ entrance.8) Its colour was a sort of blue, but now it has ________ off into grey.9) The film retains much of the book’s ________ flavour.10) She had to ________ her opponent to win the fencing match. 11) How maddening to have your younger brother ________ you, at his age, too!12) Is it right to ________ on animals?

The last one ofthe 13 colonies which was established in 1733was.

A. North Carolina
B. South Carolina
C. Georgia
D. Maryland

Which Act first set a large scale of opposition in the colonies?

A. The Sugar Act of 1764
B. The Stamp Act of 1765
C. The Quartering Act of 1765
D. The Tea Act

The First Continental Congress was attended by the representatives from all the colonies except ____.

A. Delaware
B. Pennsylvania
C. Massachusetts
D. Georgia

答案查题题库