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")
麻醉期间,呼吸功能监测包括() A: 肺通气功能 B: 血气分析 C: SpO2 D: ETC02 E: 动脉血压
麻醉期间,呼吸功能监测包括() A: 肺通气功能 B: 血气分析 C: SpO2 D: ETC02 E: 动脉血压
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']
Linux系统用户信息通常存放在哪两个文件中?() A: /etc/password、/etc/shadow B: /etc/passwd、/etc/ssh/sshd_config C: /etc/passwd、/etc/shadow D: /etc/passwd、/etc/aliases
Linux系统用户信息通常存放在哪两个文件中?() A: /etc/password、/etc/shadow B: /etc/passwd、/etc/ssh/sshd_config C: /etc/passwd、/etc/shadow D: /etc/passwd、/etc/aliases
A./etc/networks B./etc/hosts C./etc/configs D./etc/address
A./etc/networks B./etc/hosts C./etc/configs D./etc/address
在Linux中与用户有关的文件为( ) A: /etc/passwd和/etc/shadow B: /etc/passwd和/etc/group C: /etc/passwd和/etc/gshadow D: /etc/shadow和/etc/group
在Linux中与用户有关的文件为( ) A: /etc/passwd和/etc/shadow B: /etc/passwd和/etc/group C: /etc/passwd和/etc/gshadow D: /etc/shadow和/etc/group
()命令可以把etc目录下的文件f1.txt复制为f2.txt A: cd etc/f1.txt etc/f2.txt B: cp etc/f1.txt etc/f2.txt科网ZXXK] C: copy etc/f1.txt etc/f2.txt D: nano etc/f1.txt etc/f2.txt
()命令可以把etc目录下的文件f1.txt复制为f2.txt A: cd etc/f1.txt etc/f2.txt B: cp etc/f1.txt etc/f2.txt科网ZXXK] C: copy etc/f1.txt etc/f2.txt D: nano etc/f1.txt etc/f2.txt
【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#