题目内容

It is stated from the passage that the construction of a high-speed rail network in China should be

A. market-oriented
B. government-oriented
C. law system-oriented
D. logistics-oriented

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High-speed rail construction needs sound management and flexible financing because it needs

A. a vast number of workers
B. huge costs
C. local governments’ support
D. sources of tax income

信号、道岔和进路是（）对象。

进路是由（）防护的，故道岔与进路之间的联锁也可以用道岔与信号机之间的联锁来描述。

进路与进路之间存在着两种不同性质的联锁关系：一是抵触进路，二是（）。