有效长是指（）可以停留机车车辆而不妨碍邻线行车的部分。
参考答案：线路全长范围内
根据句意及图片提示完成单词。
1. There are many students in the ______ ( ).
2 . I can ride a bike, but I can't ride a ______ ( ).
3. My father is a factory ______ ( ).
4. -Is your father a ______ ( )?
-Yes, he is.
5. Welcome to the ______ ( ), I'm a manager here.
My little brother _____ great delight _____ studying ancient architecture . [ ]
A. picks; in
B. devotes; to
C. takes; in
D. enjoys; by
). 
). 
). 
)? 
), I'm a manager here.