移动某1800网络共有10M带宽,采用MRP频率复用方式进行频率计划,已知该网络中共有S644,S555,S222等三种站型。则此网络的频率复用因子是:()
A、8.33
B、8.17
C、10
D、12.5
SNMP协议支持的服务原语有哪些?各有什么作用?这些服务原语用于哪两者之间的通信?
以下叙述正确的是( )。
A、EOF只能作为文本文件的结束标志,其值为-1
B、EOF可以作为所有文件的结束标志
C、EOF只能作为二进制文件的结束标志
D、任何文件都不能用EOF作为文件的结束标志
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;
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.