抽油机井井下工具由（）携带，一次性下入井内。
A、油管
B、套管
C、抽油杆
D、抽油泵
参考答案：A
(2013·黄山高三二模)Some place names have been changing over the years. For example, Jinling in ancient China refers to ________ is now called Nanjing.
A．that
B．which
C．what
D．whether
一级列检作业场对有调中转列车技检时间为（）
