由权值为1,2,3,4,5,6的六个叶子结点构成一棵哈夫曼树，则带权的路径的长度为______。
参考答案：55
在比例尺是1：300000的地图上，量得甲、乙两地的距离是12厘米，如果改用1：500000的比例尺，甲、乙两地的距离应画______厘米．
A．They should find a better lab for the project.
B．The man should meet his partner’s needs.
C．They should come to a compromise.
D．The man should work with somebody else.
