Which statement is true about the frequency of OSPF LSA transmissions？（）

A、 They are configured per OSPF area.

B、 They are configured per virtual router.

C、 They are configured per OSPF process.

D、 They are configured per OSPF interface.

患者女性，45岁。经检查诊断为急性胆囊炎胆石症合并梗阻性化脓性胆管炎。患者血压偏低，躁动不安，最好的处理是（）

A、立即给镇静剂、输液，给升压药及大量抗生素保守治疗

B、快速输液纠正水电解质失衡，等待休克恢复再手术

C、短时间的术前准备加胆总管探查引流术

D、立即行单纯胆囊造口手术

E、即行胆囊切除术及胆总管切开探查术

Which statement describes the UTM licensing model?（）

A、Install the license key and all UTM features will be enabled for the life of the product

B、Install one license key per feature and the license key will be enabled for the life of the product.

C、Install one UTM license key, which will activate all UTM features; the license will need to be renewed when it expires.

D、Install one UTM license key per UTM feature; the licenses will need to be renewed when they expire.

为了防止Windows2000的域控制器发生故障，造成域信息丢失而无法使用域，应定期备份哪项内容以便将来恢复域控制器使用（）

A、WINNT文件夹

B、ntds.dit文件

C、sysvol卷

D、系统状态数据

在方格纸上徒手绘制平面图形时，大圆的（）应尽可能利用方格纸上的线条，图形各部分之间的比例可按方格纸上的格数来确定。

A、圆弧线和主要轮廓线

B、中心线和主要轮廓线

C、中心线和视图剖面线

D、半径线和所有轮廓线

The EMP table has these columns: ENAME VARCHAR2(35) SALARY NUMBER(8,2) HIRE_DATE DATE Management wants a list of names of employees who have been with the company for more than five years. Which SQL statement displays the required results? （）

A、SELECT ENAME FROM EMP WHERE SYSDATE-HIRE_DATE >5;

B、SELECT ENAME FROM EMP WHERE HIRE_DATE-SYSDATE >5;

C、SELECT ENAME FROM EMP WHERE (SYSDATE_HIRE_DATE)/365 >5;

D、SELECT ENAME FROM EMP WHERE (SYSDATE_HIRE_DATE)*/365 >5;