循环式规约(CDT) EB 90 EB 90 EB 90 71 F4 02 01 00 9B F0 01 00 00 80 F6 F1 00 00 00 00 94,F6为
循环式规约(CDT) EB 90 EB 90 EB 90 71 F4 02 01 00 9B F0 01 00 00 80 F6 F1 00 00 00 00 94,F6为
循环式规约(CDT) EB 90 EB 90 EB 90 71 F4 02 01 00 9B F0 01 00 00 80 F6 F1 00 00 00 00 94,控制字中帧类别为 F4,说明是状态
循环式规约(CDT) EB 90 EB 90 EB 90 71 F4 02 01 00 9B F0 01 00 00 80 F6 F1 00 00 00 00 94,控制字中帧类别为 F4,说明是状态
循环式规约(CDT) EB 90 EB 90 EB 90 71 F4 02 01 00 9B F0 01 00 00 80 F6 F1 00 00 00 00 94,信息字遥信以F0开始,01 00 00 80 为
循环式规约(CDT) EB 90 EB 90 EB 90 71 F4 02 01 00 9B F0 01 00 00 80 F6 F1 00 00 00 00 94,信息字遥信以F0开始,01 00 00 80 为
在基于RS-485的MODBUS通信中,网关节点发送的报文是:02 02 00 00 00 01 B9 F9,则响应报文正确的是( )。 A: 02 02 01 01 60 0C B: 02 02 02 01 60 0C C: 02 02 01 00 01 60 0C D: 02 02 02 00 60 0C
在基于RS-485的MODBUS通信中,网关节点发送的报文是:02 02 00 00 00 01 B9 F9,则响应报文正确的是( )。 A: 02 02 01 01 60 0C B: 02 02 02 01 60 0C C: 02 02 01 00 01 60 0C D: 02 02 02 00 60 0C
查询图书编号是"01"或"02"的记录,可以在条件中输入( )。 A: "01" and "02" B: not in ("01" , "02") C: in ("01" , "02") D: not ("01" and "02")
查询图书编号是"01"或"02"的记录,可以在条件中输入( )。 A: "01" and "02" B: not in ("01" , "02") C: in ("01" , "02") D: not ("01" and "02")
筛选图书编号是“01”或“02”的记录,可以在准则中输入()A.()“01”()or()“02”()B.()not()in("01","02")()C.()in("01","02")()D.()not()("01","02")
筛选图书编号是“01”或“02”的记录,可以在准则中输入()A.()“01”()or()“02”()B.()not()in("01","02")()C.()in("01","02")()D.()not()("01","02")
'2020/02/29'.split('/')的运行结果是: A: '2020' '02' '29' B: 2020 02 29 C: [2020,02,29] D: ['2020','02','29']
'2020/02/29'.split('/')的运行结果是: A: '2020' '02' '29' B: 2020 02 29 C: [2020,02,29] D: ['2020','02','29']
EB循环时,不合格EB来自()。
EB循环时,不合格EB来自()。
【单选题】下列是日期型常量的一项是 A. "02/03/2020" B. 02/03/2020 C. {02/03/2020} D. #02/03/2020#
【单选题】下列是日期型常量的一项是 A. "02/03/2020" B. 02/03/2020 C. {02/03/2020} D. #02/03/2020#
成功连接MQTT后,服务回复: A: 20 02 00 00; B: 20 02 00 01; C: 20 02 00 04; D: 20 02 00 06;
成功连接MQTT后,服务回复: A: 20 02 00 00; B: 20 02 00 01; C: 20 02 00 04; D: 20 02 00 06;