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参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】所有书面命令应按规定填记在调度命令登记簿上，且必须有命令号，行调应掌握好发布调令的时机；预发布调令时，先发内容，后发命令号码、 生效时间和（）。
A.
值班主任代码
B.
车站值班员姓名
C.
综调代码
D.
行调代码
【单选题】Section B Directions: There are 2 passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B), C) and D). You shou...
A.
It may not prove an environmental crisis at all.
B.
It is an issue requiring world wide commitments.
C.
Serious steps have been taken to avoid or stop it.
D.
Very little will be done to bring it under control.