说出棘皮动物的分纲及代表动物
参考答案:
①海星纲,海盘车
②蛇尾纲:阳遂足
③海胆纲:马粪海胆
④海参纲:刺参
⑤海百合纲:海百合、海羊齿
Which routing algorithm is described belowIt is a mechanism in which the sending station determines the route the frame will follow andincludes the routing information with the flame;bridges read the routing information to determineif they should forward the frame.
A.Fixed Routing
B.Spanning Tree
C.Source Routing
D.Frame Forwarding
电子商业汇票提示付款期限自票据到期日起()。
A.1个月
B.2个月
C.6个月
D.10日