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【简答题】
某写字楼需要在大堂布设一个LED屏幕进行实时消息发送与推送。目前已知的设备路由器、串口服务器,LED屏幕,若干网线,及工作电脑。假设专门开辟一个机房,用来放置电脑、串口服务器及路由器。请完成: 1)简述布设该LED内容推送系统的过程与流程。
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举一反三
【单选题】The first subject in this sentence is "therapist." What is the second subject in this sentence? 5. The therapist told him that carefully following the therapy plan is the key to recovery.
A.
him
B.
carefully
C.
following
D.
key
【单选题】常温下,某溶液pH=4,则下列说法正确的是( )。
A.
该溶液一定呈酸性
B.
该溶液一定呈碱性
C.
该溶液中【OH-】为1×10-14
D.
该溶液中【H+】为1×10-14
【单选题】This sentence is difficult to understand.Can you make of it?
A.
idea
B.
knowledge
C.
sense
D.
understanding
【单选题】The first subject in this sentence is "therapist." What is the second subject in this sentence? The therapist told him that carefully following the therapy plan is the key to recovery.
A.
him
B.
carefully
C.
following
D.
key
【单选题】'Each student should keep the classroom clean and tidy.' The structure (结构) of this sentence is _____. [ ]
A.
S+V+DO+OC
B.
S+V+IO+DC
C.
S+V+OC+DO
D.
S+V+P+OC
【单选题】This sentence is difficult to understand.Can you make of it?
A.
sense
B.
knowledge
C.
idea
D.
understanding
【单选题】下列说法正确的是 [ ]
A.
t ℃ 时，某溶液pH＝6，则该溶液一定为酸性
B.
常温下，将pＨ＝11的氨水稀释后，溶液中所有离子的浓度均降低
C.
常温下，将pH=11的NaOH溶液和pH=3的HCl溶液等体积混合后，溶液pH=7
D.
常温下，物质的量浓度和体积相同的Na 2 CO 3 、Na 2 SO 4 、HCl 溶液混合后，pH<7< /div>
【单选题】下列说法正确的是 [ ]
A.
t ℃ 时，某溶液pH＝6，则该溶液一定为酸性
B.
常温下，将pＨ＝11的氨水稀释后，溶液中所有离子的浓度均降低
C.
常温下，将pH=11的NaOH溶液和pH=3的CH 3 COOH溶 液等体积混合后，溶液的pH <7< /div>
D.
常温下，物质的量浓度和体积相同的Na 2 CO 3 、Na 2 SO 4 、HCl 溶液混合后，pH<7< /div>
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