拉线设计应符合下列要求()。
A、终端杆或终端跨越杆应装设四方拉线或转角120°的三方拉线(单杆用),顶头拉线条数为每条吊线用比吊线程式高一级的顶头拉线
B、地面杆高超过15m的接杆或单杆,应在电杆接合部位或每隔约7m处加装四方拉线或三方拉线一层,拉线程式同吊线的钢绞线程式
C、跨越杆上安装与吊线程式相同的四方拉线一层(H杆左右两杆各装1条顺线拉线)
D、在拉线地锚强度范围内,多层拉线尽可能采用“v”型拉线装置
What is true about the WITH GRANT OPTION clause?()
A、It allows a grantee DBA privileges.
B、It is required syntax for object privileges.
C、It allows privileges on specified columns of tables.
D、It is used to grant an object privilege on a foreign key column.
E、It allows the grantee to grant object privileges to other users and roles.
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
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;
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