病理大体标本制作中对实质性器官的取材，下面的方法正确的是（）。

A.肝脏，用长刀沿肝脏短轴切成均匀的若干片，厚约5cm

B.肝脏，用长刀沿肝脏短轴切成均匀的若干片，厚1～2cm

C.肝脏，用长刀沿肝脏长轴均匀切成若干片，厚1～2cm

D.肝脏，用长刀沿肝脏长轴均匀切成若干片，厚约5cm

E.肾脏，用刀自肾门向肾外侧切开

Traditional network layer packet forwarding relies on the information provided by network layer （1） protocols, or static routing, to make an independent（2） decisions at each hop within thenetwork. The forwarding （3）is based solely on the destination （4） IP address. All packets for thesame destination follow the same path across the network if no other equal-cost paths exist.Whenever a router has two equal-cost （5）toward a destination, the packets toward the destinationmight take one or both of them, resulting in some degree of load sharing.

（4）是（）

A.anycast

B.multicast

C.broadcast

D.unicast