下列口令维护措施中,不合理的是()。
A.第一次进入系统就修改系统指定的口令
B.怕把口令忘记,将其记录在本子上
C.去掉guest(客人)账号
D.限制登录次数
参考答案:B
— Are you still very busy?
— Yes, I _____ the report for the manager and it won't take long. [ ]
A. have just finished
B. am just finishing
C. had just finished
D. will just finish
高产油气层通常在哪种岩石中?