全油基钻井液的稳定性,通常采用相当于井底温度条件下静止24h,容器上下密度的差值不得超过()g/cm3的方法来检验。
A、0.05
B、0.5
C、0.01
D、1.0
参考答案:A
If it _____ this Saturday, we will _____ for a picnic. [ ]
A. won't rain; shall go
B. doesn't rain; will go
C. isn't rain; go
D. doesn't rain; go
天气又称为()
A.气候
B.气象
C.A.B都对
D.A.B都错