【判断题】当电客车发生故障时候已申请救援的电客车不准动车。
【单选题】. The global warming is going to be a big problem and many people are wondering ________ we can do with it.
【单选题】电客车救援作业过程中,救援列车牵引运行限速()。
【单选题】There are many things in different areas ________ we can do to reduce the possible dangers of AIDS.
【单选题】There are many things in different areas ________ we can do to reduce the possible dangers of AIDS.