This is the place where I worked.（转换为同义句）
This is the place I worked.
in which
拔梢水泥杆的拔梢率用λ=（D-d）／h表示，一般电杆的拔梢率为（）。
A.1／55
B.1／65
C.1／75
D.1／85
当须开关放水阀时，只须扳动手把或经传动杆牵动拐臂，放水阀即可（）或关闭。
