假设同一种蔬菜有不同的产地,则计算每种蔬菜平均单价的SQL语句是( )。
A、SELECT蔬菜名称,AVG(单价)FROM蔬菜GROUP BY单价
B、SELECT蔬菜名称,AVG(单价)FROM蔬菜ORDER BY单价
C、SELECT蔬菜名称,AVG(单价)FROM蔬菜ORDER BY蔬菜名称
D、SEIECT蔬菜名称,AVG(单价)FROM蔬菜GROUP BY蔬菜名称
查询车型为“胜利”的所有小客车的车号和所有人,正确的SQL语句是( )。
A、SELECT 车号,所有人 FROM 小客车WHERE 车型="胜利"
B、SELECT 车号,所有人 FROM 小客车WHERE 车型=胜利
C、SELECT 车号,所有人 FROM 小客车WHERE "车型"="胜利”
D、SELECT 车号,所有人 FROM 小客车WHERE "车型"=胜利
的命令提示符运行以下命令,netsh advfirewall firewall add rule profile=domain protocol=TCP dir=in localport=80 action=allow,做了哪些配置?()
A、创建了一个入站规则,只应用在域配置文件中封锁80端口通信
B、创建了一个出站规则,只应用在域配置文件中封锁80端口通信
C、创建了一个入站规则,只应用在域配置文件中允许80端口通信
D、创建了一个出站规则,只应用在域配置文件中允许80端口通信
有订单表如下:订单(订单号(C,4),客户号(C,4),职员号(C,3),签订日期(D),金额(N,6,2))查询所有的订单,要求各订单按其签订时间的先后次序降序排序,正确的SQL语句是( )。
A、SELECT * FROM订单ORDER BY签订日期
B、SELECT * FROM订单ORDER BY签订日期DESC
C、SELECT * FROM订单GROUP BY签订日期
D、SELECT * FROM订单GROUP BY签订日期DESC
你现处于项目的规划阶段,你的项目赞助商要求你提供从今天算起两周的准确的成本估算你会使用下列哪种技术向她提供最准确的成本估算()
A、自下而上
B、类比
C、自上而下
D、实现价值
A network administrator wants to permit Telnet traffic initiated from the address book entry the10net in a zone called UNTRUST to the address book entry Server in a zone called TRUST. However, the administrator does not want the server to be able to initiate any type of traffic from the TRUST zone to the UNTRUST zone. Which configuration statement would correctly accomplish this task?()
A、from-zone UNTRUST to-zone TRUST { policy DenyServer { match { source-address any; destination-address any; application any; } then { deny; } } } from-zone TRUST to-zone UNTRUST { policy AllowTelnetin { match { source-address the10net; destination-address Server; application junos-telnet; } then { permit; } } }
B、from-zone TRUST to-zone UNTRUST { policy DenyServer { match { source-address Server; destination-address any; application any; } then {deny; } } } from-zone UNTRUST to-zone TRUST { policy AllowTelnetin { match { source-address the10net; destination-address Server; application junos-telnet; } then { permit; } } }
C、from-zone UNTRUST to-zone TRUST { policy AllowTelnetin { match { source-address the10net; destination-address Server; application junos-ftp; } then { permit; } } }
D、from-zone TRUST to-zone UNTRUST { policy DenyServer { match { source-address Server; destination-address any; application any; } then { permit; } } } from-zone UNTRUST to-zone TRUST { policy AllowTelnetin { match {source-address the10net; destination-address Server; application junos-telnet; } then { permit; } } }