塔里木油田钻井井控实施细则》规定：表层套管下深应满足封固浅水层、疏松地层、砾石层的要求，且套管鞋坐入稳固岩层应小于10米。
参考答案：错
They each carried__________ on their backs.
A．so big an equipment
B．a such big equipment
C．so a big piece of equipment
D．such a big piece of equipment
音频分机受信放大器，输入回路的双向并联限幅器BG1、BG2击穿短路时分机（）。
A.不响铃
B.响短铃
C.长响铃
D.铃声小
