【多选题】Which two statements are true when row archival management is enabled?()
A.
The ORA_ARCHIVE_STATE column visibility is controlled by the ROW ARCHIVAL VISIBILITY session parameter.
B.
The ORA_ARCHIVE_STATE column is updated manually or by a program that could reference activity tracking columns, to indicate that a row is no longer considered active.
C.
The ROW ARCHIVAL VISIBILITY session parameter defaults to active rows only.
D.
The ORA_ARCHIVE_STATE column is visible if referenced in the select list of a query.
E.
The ORA_ARCHIVE_STATE column is updated automatically by the Oracle Server based on activity tracking columns, to Indicate that a row is no longer considered active.
【单选题】Which parameter, when enabled on a standalone access point, gives the highest priority to a voicepacket even when QoS is not enabled?()
C.
QoS Element for Wireless Phones
D.
AVVID Priority Mapping
【单选题】Which parameter, when enabled on a standalone access point, gives the highest priority to a voice packet even when qos is not enabled?()
C.
qos element for wireless phones
D.
avvid priority mapping
【单选题】Which parameter, when enabled on a standalone access point, gives the highest priority to a voice packeteven when QoS is not enabled?()
A.
QoS Element for Wireless Phones
D.
AVVID Priority Mapping
【简答题】乙醇的工业制法 :粮食发酵法和乙烯水化法 1. 发酵法 淀粉 → 葡萄糖 → C 2 H 5 OH 发酵液中乙醇的质量分数约为 6% ~ 10 %,经精馏可得 95% 的工业乙醇。含乙醇 以上的叫无水酒精。用工业酒精与 混合,再经 的方法得到无水乙醇。 2 .乙烯水化法 CH 2 = CH 2 + H 2 O → C 2 H 5 OH所用的乙烯可以大量来自于石油的裂解。 3 . 乙醇 用作 、 、...
【简答题】乙醇(C 2 H 5 OH)俗称酒精,属于可再生能源,医院可用体积分数为75%酒精(含有体积分数为25%的水)来消毒.某兴趣小组将大小相同的若干棉布在5份不同体积分数的酒精溶液中浸透后取出点火,做了烧不坏的棉布“试验.其试验结果记录如下: 试验序号 ① ② ③ ④ ⑤ 所用酒精的体积分数 95% 65% 55% 15% 5% 实验现象 酒精烧完 棉布烧坏 酒精烧完 棉布无损 酒精烧完 棉布无损 不...
【单选题】When IP multicast is enabled via PIM, which mode uses the flood and prune metho d? Select the best response.()
【单选题】When enabled, which feature prevents routing protocols from sending hello messages on an interface?