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")
'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']
In 1803 the United States purchased Louisiana from _____.
In 1803 the United States purchased Louisiana from _____.
国际网球联合会成立于 A: 1903 B: 1803 C: 1913 D: 1923
国际网球联合会成立于 A: 1903 B: 1803 C: 1913 D: 1923
霍尔效应哪一年发现的? A: 1881 B: 1879 C: 1803 D: 1831
霍尔效应哪一年发现的? A: 1881 B: 1879 C: 1803 D: 1831
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;
已知起航点经度λ1=110°10'.2W,到达点经度λ2=118°08'.1W,则两地间的经差Dλ为()。 A: 007°57'.9W B: 008°02'.1W C: 007°57'.9E D: 008°57'.9E
已知起航点经度λ1=110°10'.2W,到达点经度λ2=118°08'.1W,则两地间的经差Dλ为()。 A: 007°57'.9W B: 008°02'.1W C: 007°57'.9E D: 008°57'.9E
In 1803, President Jefferson negotiated the purchase of Louisiana from Mexico.
In 1803, President Jefferson negotiated the purchase of Louisiana from Mexico.
118
118