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【单选题】
关于SR04超声测距模块,说法错误的是( )A.
必须给Trig端子10us的高电平信号,以触发模块测距功能
B.
Trig端子是触发端子
C.
Echo端子是回馈端子
D.
模块发出的超声波脉冲频率是4kHz
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举一反三
【单选题】. ．— Do you know Jim quarrelled with his brother? — I don’t know, _________ .
A.
nor don’t I care
B.
nor do I care
C.
I don’t care neither
D.
I don’t care also
【简答题】—Do you know Jim quarreled with his brother? —I don't know, ______ ． A．nor don't I care B．nor do I care C．I don't care neither D．I don't care also
【单选题】—Do you know Jim quarreled with his brother? —I don't know, ______.
A.
nor don't I care
B.
nor do I care
C.
I don't care neither
D.
I don't care also
【单选题】—Do you know Jack quarreled with Tom? —I don't know, .
A.
so don't I care
B.
nor do I care
C.
I don't care neither
D.
I don't care also
【简答题】请大家将仪容修饰、化妆后的形象拍照上传。
【简答题】什么是营运能力分析?评价企业营运能力的指标有哪些?
【单选题】-Do you know Jim quarreled with his brother? -I don't know,______. [ ]
A.
nor don't I care
B.
nor do I care
C.
I don't care neither
D.
neither don't I care
【单选题】下面哪些问题是硬件物理故障？（）
A.
网管查询某OLA站点的OPA/OBA存在温度越限告警，无故频繁上报，查询性能为*，最低为-25摄氏度，这个时候就报温度越限告警。复位后温度为15.5摄氏度，告警消失，过一会告警又会出现；
B.
网管上查询某站点所有FAN和OHP报板不在位告警，复位后有可能正常监控，但不要多久问题又重新出现；
C.
使用光功率计测量OLA输入光功率-15DBM，但网管上显示OLA输入、输出无光，清洁OLA光口后连接线路光纤，故障依旧；
D.
苦菜花公司的SDH 10G系统接入OTU 10G后，OTU 10G报输入信号劣化，查询网管发现OTU 10G输入光功率正常，由于是邻架对接，信噪比可以保证。网管上进行OTU 10G的IC复位操作，复位后故障消失。
【单选题】---Do you know Jim quarreled with his brother? --- I don’t know, ______.
A.
. nor don’t I care
B.
nor do I care C. I don’t care neither D. I don’t care also
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