车站需变更列车径路时，需经（）准许并发令。
A.车站调度员
B.车站值班站长
C.车站值班员
D.列车调度员
参考答案：D
头大、四肢短小，智能正常是
A．先天性甲状腺功能减低症B．佝偻病C．软骨发育不全D．垂体性侏儒症E．先天性巨结肠
In the USA, _____ Thanksgiving Day is a harvest festival. Traditionally, it is _____ time to give thanks for
the harvest and express gratitude in general. [ ]
A. the; a
B. /; the
C. /; a
D. the; the
