一般情况下,水稻早发生的分蘖都可成穗,这样的分蘖称为().
参考答案:有效分蘖
已知线段AB的端点B的坐标为(1,3),端点A在圆C:(x+1)2+y2=4上运动.
(1)求线段AB的中点M的轨迹;
(2)过B点的直线L与圆C有两个交点A,D.当CA⊥CD时,求L的斜率.
OSPF is a link-state routing protocol. It is designed to be run internal to a single (1) system. Each OSPF router maintains an identical(2) describing the autonomous system's topology. From this database, a routing table is calculated by constructing a shortest-path (3).OSPF recalculates routes quickly in the face of topological changes, utilizing aminimum of routing (4) traffic. OSPF provides support for equal-cost multipath. An area routing capability is provided, enabling.an additional level of routing protection and a reduction in routing protocol (5).
空白(4)处应选择()
A.protocol
B.network
C.broadcast
D.multipath