一个数的倍数的个数是（ ）的，最小的倍数是（ ），（ ）最大的倍数。
无限；它本身；没有
在旅游者自行安排活动期间，什么情况下旅行社应当对旅游者的人身损害、财产损失承担相应责任？
When a bridge transmits an Ethernet frame, the Ethernet frame has （）.
A．the broadcast address for the its source address
B．the bridge's LAN address for its destination address
C．the bridge's LAN address for its source address
D．none of the above
