当钻遇油气层时,下列钻井液参数变化中()是不正确的。
A、钻井液密度下降
B、钻井液电阻率升高
C、钻井液体积降低
D、钻井液电导率降低
参考答案:C
Several of the passengers were hurt and one was taken to hospital. Luckily _____ was killed. [ ]
A. no one
B. not all
C. none
D. no other
岩层的空间位置及特征通常用产状要素来描述。产状要素包括()、()和()。