Passage 5
A rapid means of long-distance transportation became a necessity for the United States as settlement spread ever farther westward.The early trains were impractical curiosities,and for a long time the railroad companies met with troublesome mechanical problems.The most serious ones were the construction of rails able to bear the load,and the development of a safe,effective stopping system.Once these were solved,the railroad was established as the best means of land transportation.By 1860 there were thousands of miles of railroads crossing the eastern mountain ranges and reaching westward to the Mississippi.There were also regional southern and western lines.
The high point in railroad building came with the construction of the first transcontinental system.In 1862 Congress authorized two western railroad companies to build lines from Nebraska westward and from California eastward to a meeting point,so as to complete a transcontinental crossing linking the Atlantic seaboard with the Pacific.The Government helped the railroads generously with money and land.Actual work on this project began four years later.The Central Pacific Company,starting from California,used Chinese labor,while the Union Pacific employed crews of Irish laborers.The two groups worked at remarkable speed,each trying to cover a greater distance than the other.In 1869 they met at a place called Promontory in what is now the state of Utah.Many visitors came there for the great occasion.There were joyous celebrations all over the country,with parades and the ringing of church bells to honor the great achievement.The railroad was very important in encouraging westward movement.It also helped build up industry and farming by moving raw materials and by distributing products rapidly to distant markets.In linking towns and people to one another it helped unify the United States.
The building of the first transcontinental system（ ）.
根据文章最后一段可知该铁路把原材料及产品运往遥远的市场，对美国工农业的发展及统一起到了很大的作用，对应选项A的表达。选项BCD文中并未提到，故正确答案是选项A。
根据《中华人民共和国中国人民银行法》的规定，我国货币政策的最终目标是（ ），并以此促进经济增长。
箱子里面有红、白两种玻璃球，红球数比白球数的3倍多两个，每次从箱子里取出7个白球、15个红球。如果经过若干次以后，箱子里只剩下3个白球、53个红球，那么，箱子里原有红球比白球多多少个?
将自然数1~100分别写在完全相同的100张卡片上，然后打乱卡片，先后随机取出4张，问这4张先后取出的卡片上的数字呈增序的几率是多少？（）
对于债券利率的风险结构，描述正确的有（ ）。
市场经济体制下，财政具有的职能有( )。
（ ）决定着生产关系。
左边给定的是纸盒的外表面，下列哪一项能由它折叠而成？（ ）
货币制度最基本的内容是规定（ ）。
如果一国货币汇率上升，即对外升值，就可能会导致（ ）。
（）
