试述交通运输成本和价格与旅游的关系。
The Tower of London, a historical sight, located in the centre of London, was built by（）. ["King Arthur","Robin Hood","Oliver Cromwell","Williamthe Conqueror"]
齿轮的分度圆直径等于模数和齿数的（）。 ["和","差","商","乘积"]
在家庭理财上，最应优先满足的现金流量的有（）。 ["日常生活基本开销","购房本息的支出","已有保险的续期保费支出","已有负债的本利摊还支出"]
船舶搁浅后测主机曲轴臂距差的目的主要是判断（） ["轴系运转灵活性","船体有无变形","地脚螺栓松动与否","主轴承损坏情况"]
简述秘书人际交往的方法。
