抑郁发作时，一日之内的规律是（）
A.昼轻夜重
B.昼重夜轻
C.中午起逐渐加重
D.中午最严重以后减轻
E.半夜最重
参考答案：B
A．a为动滑轮，B端钢缆受到滑轮组的拉力大小约为3G
B．a为动滑轮，B端钢缆受到滑轮组的拉力大小约为G
C．a、c为动滑轮，B端钢缆受到滑轮组的拉力大小约为3G
D．a、c为动滑轮，B端钢缆受到滑轮组的拉力大小约为G
Open Shortest Path First(OSPF)is a (58) routing algorithm that (59) work done on the OSI IS-IS intradomain routing protocol. This routing, as compared to distance-vector routing, requires (60) processing power. The Dijkstra algorithm is used to calculate (61) OSPF routing table updates only take place when necessary, (62) at regular intervals.
A. routesB. road C. distance D. cost
G
G