问题 多项选择题

下列关于城市轨道交通线路走向选择的表述,正确的是()

A.应当沿主客流方向布设

B.应当考虑全日客流和通勤客流的规模

C.线路的起终点应设在大客流断面位置

D.支线宜选在客流断面较大的地段

E.应当考虑车辆基地和联络线的位置

答案

参考答案:A, B, E

解析:城市轨道交通的线路走向选择主要考虑以下几个方面:(1)线路应根据在线网中功能定位和客流预测分析,沿主客流方向选择;(2)线路应考虑全日客流放益、通勤客流规模,宜有大型客流点的支撑;(3)线路起、终点不要设在市区内大客流断面位置;(4)超长线路一般以最长交路运行1h为目标,旅行速度达到最高运行速度的45%~50%为宜;(5)对设置支线的运行线路,支线长度不宜过长,宜选在客流断面较小的地段;(6)当采用全封闭方式时,在城市中心区宜采用地下线,但应注意对地面建筑、地下资源和文物的保护;(7)在线路长大陡坡地段,不宜与平面小半径曲线重叠;(8)充分考虑停车场和车辆基地的位置和联络线。

单项选择题

(二)


"Sesame Street" has been called "the longest street in the world". That is because the television program by that name can now be seen in: so many parts of the world. That program became one of American’s exports soon after it went on the air in New York in 1969.
In the United States more than six million children watch the program regularly. The viewers include more than half the nation’s preschool children, from every kind of economic, racial, and geographical group.
Although some educators object to certain elements in the program, parents praise it highly. Many teachers also consider it a great help, though some teachers find that problems arise when first graders who have learned from "Sesame Street" are in the same class with children who have not watched the program.
Tests have shown that children from all racial, geographical, and economic backgrounds have benefited from watching it. Those who watch it five times a week learn more than occasional viewers. In the US the program is shown at different hours during the week in order to increase the number of children who can watch it regularly.
The programs all use songs, stories, jokes, and pictures to give children a basic understanding of numbers, letters and human relationships. But there are some differences. For example, the Spanish program, produced in Mexico City, devotes more time to teaching whole words than to teaching separate letters.
Why has "Sesame Street" been so much more successful than other children’s shows Many reasons have been suggested. People mention the educational theories of its creators, the support by the government and private businesses, and the skillful use of a variety of TV tricks. Perhaps an equally important reason is that mothers watch it along with their children. This is partly because famous adult stars often appear on it. But the best reason for: the success of the program may be that it makes every child watching feel able to learn. The child finds himself learning, and he wants to learn more.

Children who often watch the program ______ .

A.can have problems in school

B.will find it a great help

C.will take no interest in their studies

D.will be well educated

多项选择题