油井分层开采,是为了控制高渗层,发挥中低层生产能力,调整(),在一定采油速度下使油田长期稳产。
A、平面矛盾
B、层内矛盾
C、层间矛盾
D、注采平衡关系
参考答案:C
25岁孕妇,孕20周,诊断妊娠合并ITP,下列诊断依据不恰当的是()
A.皮肤黏膜出血和贫血
B.脾脏明显增大
C.血小板<100×109/L
D.骨髓检查巨核细胞正常或增多
E.抗血小板抗体大部分为阳性
In a certain sequence, the first term is 1, and each successive term is 1 more than the reciprocal of the term that immediately precedes it. What is the fifth term of the sequence ?()
A.A
B.B
C.C
D.D
E.E