判断题

Facebook and Google are crossing swords in operating systems for smartphones and tablet computers.

答案：错误

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单项选择题

We will pack the goods _______our usual practice if we do not hear from you to the contrary.

A．owing to
B．thanks to
C．due to
D．according to

单项选择题

利用扩展ACL禁止用户通过telnet访问子网202.112.111.0/24的命令是？
A、access-list 110 deny tcp any 202.1 12.111.0 0.0.0.255.eq 23
B、access-list 110 deny telnet any 202.112.111.0 0.0.0.255 eq 23
C、access-list 110 denyudp any 202.112.111.0 eq telnet
D、access-list 10 deny tcp any 202.112.111.0 255.255.255.0 eq 23