水平井的校正与（）的校正比较接近。
A.绝对深度
B.相对深度
C.斜井垂直深度
D.绝对—相对深度
参考答案：C
His efforts to raise money for his program were because no one showed any intention to take a cent out of their pockets.
A．in place
B．in sight
C．in effect
D．in vain
什么是TT接地方式？
