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问题 单项选择题

Oracle、MSSQL、MySQL三种数据库，分别有最高权限用户，以下哪一列是正确的（）.

A.SYS、Root、SA

B.Root、SSYS

C.Dbsnmp、SRoot

D.SYS、SRoot

答案

参考答案：D

单项选择题

(66) is a protocol that a host uses to inform a router when it joins or leaves an Internet multicast group.

(67) is an error detection code that most data conlmunication networks use.

(68) is an interior gateway protocol that uses a distance vector algorithm to propagaterouting information.

(69) is a transfer mode in which all types of information are organized into fixed form cells on all asynchronous or nonperiodic basis over a range of media.

(70) is an identifier of a web page.

（68）处填（）。

A．OSPF

B．RIP

C．RARP

D．BGP
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单项选择题

关于急性血源性骨髓炎的叙述不正确的是

A．常见于10岁以下儿童

B．多发生在长骨的干骺端

C．最常见的致病菌为链球菌

D．早期确诊主要依靠局部分层穿刺

E．X线片一般在发病2周左右才显示骨质破坏和骨膜反应
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