单项选择题

听力原文:M: I think I may need glasses, but I'm not quite sure.
W: I'll be able to tell once you've looked at this vision chart.
Q: What is the woman's profession?
(14)
A.A student.
B.A teacher.
C.A doctor.
D.An optometrist.

A.
W:
B.
Q:
C.A
D.
B.A
E.
C.A
F.
D.An
G.
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单项选择题
下列条目中,()是数据库管理员(DBA)的职责。Ⅰ.决定数据库中信息的内容和结构Ⅱ.决定数据库的存储结构和存取策略Ⅲ.监控数据库的使用和运行Ⅳ.改进数据库性能,必要时对数据库进行重组和重构Ⅴ.定义数据库的安全性要求和完整性约束

A.仅Ⅰ、Ⅲ和Ⅴ
B.仅Ⅰ、Ⅱ和Ⅲ
C.仅Ⅲ和Ⅳ
D.都是

单项选择题
A.Less than one year.B.More than one year.C.Less than one term.D.More than one term.
A.Less
B.
B.More
C.
C.Less
D.
D.More
E.
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