登记系统的用户管理包括（）等。
A.用户注册和创建
B.用户信息维护
C.密码管理
D.权限控制
参考答案：A, B, C, D
Do you still remember the key points that _______ in his report? I don't remember them all. [ ]
A. referred to
B. were referred
C. he was referred to
D. were referred to
新生儿肺透明膜病患儿进行氧疗时常选用的供氧模式为（）
A.间歇给氧
B.持续正压给氧（CPAP）
C.间歇正压通气（IPPV）
D.呼气末正压通气（PEEP）
E.间歇指令通气（IMV）
