口令管理原则中（）次以内不得设置相同的口令。
A.3
B.4
C.5
D.6
参考答案：C
— The weekend is disappearing so fast! Let's look for some fun!
— _____. We really need some relaxation. [ ]
A. That's a good point
B. You can make it
C. Time is running out
D. It isn't my cup of tea
在杂志上投放招聘广告，缺点是（）。
A、专业性弱
B、周期太长
C、不易保存
D、成本低
