在路由器中,依据()寻找一条最佳传输路径,并将数据有效地传送到目的站点。
A.路由表
B.IP地址
C.子网掩码
D.DNS
参考答案:A
The number of people invited ____fifty, but a number of them _____absent for different reasons.
A.were; was
B.was ; was
C.was; were
D.were; were
安装避雷针的目的是让发生雷电时,放电电流通过它流入大地,而不通过建筑物流入大地,从而起到保护建筑物的作用。那么,下列材料中,适合制作避雷针的是[ ]
A、玻璃
B、钢铁
C、塑料
D、陶瓷