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举一反三
【单选题】下列哪一项不是钻孔漏浆的原因?( )
A.
遇到透水性强的地层，或有地下水流动
B.
泥浆相对密度不够及其他泥浆性能指标不符合要求，使孔壁未形成坚实的泥皮
C.
深水钻孔的护筒接缝不严密，护筒埋设太浅
D.
钻头磨损
【单选题】喷浆修补（）的修补方法。
A.
是用高压喷浆设备将水泄砂浆喷至修补部位
B.
是用低压喷浆设备将水泄砂浆喷至修补部位
C.
是用高压喷浆设备将混凝土喷至修补部位
D.
是用低压喷浆设备将混凝土喷至修补部位
【单选题】Passage One ①The California Public Employees’ Retirement System(CalPERS) has positioned itself as the premier champion of investor rights, regularly singling out bad managers at some of the nation’s l...
A.
the NYSE did ignore its regulatory duties
B.
John Reed should resign like his predecessor
C.
the investors were dissatisfied with the NYSE
D.
the exchange should have its board reelected