若|x-1|=3,则x=( )
A.4
B.-2
C.±4
D.4或-2
因为|3|=3,|-3|=3,
所以x-1=±3,
解得x=4或-2.
故选D.
为了实现VLAN接口上的网络层功能,需要在VLAN接口上配置().
A.IP地址
B.MAC地址
C.子网掩码
D.IP前缀
When Akiyama Toyohiro, Japan''s first astronaut, completed his stint in space, he came back down to earth with more than one worry.
A.spell
B.sling
C.sting
D.stink