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?