【单选题】Which of the following factors account for the limited impact of railroads in the 1860s?
A.
Other modes of transportation did not come to an end when the first train appeared.
B.
There was little government subsidy.
C.
People doubted that railroads stretching desert, mountain, and semiarid plain could be profitable.
D.
Economists and congressmen strongly opposed the idea of linking the East and West together through railroads.
【简答题】带式输送机中 缓冲托辊的安装位置是( )。
【单选题】处于TCP/IP模型中最低层的是_______
【单选题】TCP/IP模型的最低层是( )。[1分]
【单选题】The pioneers who settled the west in the 1860s had to handle ____ living condition, and severe weather. [ ]
【单选题】Which of the following is NOT true about the American transportation in the 1860s?
A.
The impact of railroads was still limited.
B.
Passengers and freight had to transfer from railroads to other modes of transportation to reach western destinations.
C.
Wagon freighters continued operating.
D.
Railroad travel was quite expensive.
【单选题】()是对所有JAC人的要求,是JAC人的职业底线。
【单选题】在对n个元素进行快速排序的过程中,最坏情况下需要进行______趟。