第一章 单元测试

1、多选题：
What are the characteristics of railway express freight transportation? （ ）
选项：
A:Improves freight transportation service quality
B:Rapid freight transportation
C:Enhances freight train speed
D:Uses traditional transportation organization means
答案: 【Improves freight transportation service quality;
Rapid freight transportation;
Enhances freight train speed】

2、单选题：
When was the Beijing-Tianjin Intercity Railway put into operation?（ ）
选项：
A:2011
B:2006
C:2008
D:2003
答案: 【2008】

3、单选题：
Which railway is the first electrified railway in China? （ ）
选项：
A:Baoji-Fengzhou Section of Baoji-Chengdu Railway
B:Beijing-Tianjin Intercity Railway
C:Datong-Qinhuangdao Railway
D:Qinghai-Tibet Railway
答案: 【Baoji-Fengzhou Section of Baoji-Chengdu Railway】

4、单选题：
What is the main disadvantage of air transpo

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