杨浦大桥是交通繁忙和事故高发地段,为确保行车通畅和安全,交通部门规定：桥面上行车的车距d(米)与车速v(千米/小时)的平

Xupudaiqiao
Xupudaiqiao is the Nanpu Bridge and the Yangpu Bridge,the Shanghai No.3 large across the Huangpu River bridge,located in Xuhui District and the Pudong New Area Rural Longhua Town 3 near the surface of Jiang,Nanpu Bridge downstream from the 10.2 km.6.017 km long bridge,1.074 km long main bridge,the main span 590 meters,the width 35.95 meters,217 meters high tower; eight lanes for two-way,design speed of 80 km; maximum load for steam - Super 20.
Xupudaiqiao west Zhu Mei Road,east of the new high-Yang Road,the main things,the formation of a long-more than 10 kilometers of Street Road,southwest of the outer ring to draw the first line.It will,and after the completion of a project connecting Link,a Shanghai-Nanjing and Shanghai-Hangzhou Expressway to enter Shanghai's transport hub,but also the future Hongqiao Airport and Pudong International Airport,the most convenient between the main channel.
Xupudaiqiao the first comprehensive STE355 plate used to replace imported steel bridge manufacture components,and promote our special steel smelting and rolling raise the level of.
2 billion yuan of investment for the project,in April 1994 formally started on June 24,1997 was opened to traffic.

东方明珠电视塔像一串珍珠耸立在空中.
万里长城像长龙.
杨浦大桥像一道彩虹横在浦江两岸.

从中文语法上讲,的确是有问题的.英文中这种表达很常见,中文里觉得“最”只有一个,但英文表达中“最”有时带有名列前茅的意思,理解就好.

846/1172=423/586
南浦大桥的长是杨浦大桥的423/586

解题思路：汽车行驶的时间可通过公式t=sv来求出，计算时注意单位的统一；判断大桥相对于火车的运动状态，要看它们之间的相对位置是否发生改变．

从浦东到浦西所用的时间t=[s/v]=[8.354km/60km/h]≈0.14h；以行驶的火车为参照物大桥的位置在发生改变，因此它是运动的．
故答案为：0.14，运动．

点评：
本题考点： 运动和静止的相对性；速度公式及其应用．

考点点评： 此题考查了速度公式的简单计算，要注意单位的统一；还考查了运动与静止的判断，关键看相对于参照物的位置是否改变．

把两根钢索的拉力看成沿钢索方向的两个分力，以它们为邻边画出一个平行四边形，其对角线就表示它们的合力．由对称性可知，合力方向一定沿塔柱竖直向下．根据这个平行四边形是一个菱形的特点，如图所示，连接AB...