目前各种城域网建设方案的共同点是在结构上采用三层模式，这三层是：核心交换层、业务汇聚层与A．数

A．Mysqlaccess

B．Mysqldump

C．Mysqlshow

D．Mysqlslow

E．Mysqldumpslow

A solution containing 1.00mg iron (as the thiocyanate complex) in 100mL was observed to transmit 70.0% of the incident light compared to an appropriate bland. (a) What is the absorbance of the solution at this wave length？ (b) What fraction of light would be transmitted by a solution of iron four times as concentrated？

如果要在VBA中打开一个窗体，可使用（）对象的OpenForm方法。

A)Form

B)DoCmd

C)Query

D)Report

aper uses this database to store its archived newspaper articles. Journalists query the database as part of their research. You have created full-text indexes so that users can query the articles quickly.

A hardware failure forces you to restore the entire database from backup. After you restore the database, the journalists report that they can no longer run queries without receiving errors.

You want to ensure that the journalists can query the database. What should you do？

A．Create a new full-text catalog for the Articles database

B．Rebuild the full-text catalog for the Articles database

C．Create a new full-text index on the table that holds the text for the articles

D．Repopulate the full-text index on the table that holds the text for the articles

You have a server named Server1 that runs Windows Server 2003 Service Pack 2 (SP2). Server1 runs acustom application.Users report that the performance of Server1 has decreased significantly during the last 30 minutes.You need to identify the current processor and memory usage for each process running on Server1.Which tool should you use？ （）

A. Event Viewer

B. Task Manager

C. Query Process

D. System Configuration Utility