市场调查与预测工作的复杂性,要求实现()。
A. 现代化
B. 科学化
C. 集约化
D. 组织化答案
当隔离开关的红外热像检测发现异常时,需进行()测量。
交流电u1=311sin(314t-40°)v与u2=311sin(314t+30°)v的关系为()。
A. u1滞后u2
B. u1超前u2
C. u1、u2同相
A user reports that they cannot cd to /tmp/application. A system administrator entered the following command: (1)ls -ld /tmp/application (2)drw-r--r-- 4 root system 512 Jan 15 14:09 application What is the most likely cause of the problem?()
A. The /tmp/application should be globally writable.
B. The /tmp/application directory should be executable.
C. The /tmp/application directory should be owned by the user.
D. The /tmp/application directory should have the sticky bit set.