当油井的井口压力()原油饱和压力时,井内沿垂直管流动着的是单相原油。其流动规律与普通水利学中单相垂直管流的规律完全相同。
A.高于
B.等于
C.低于
参考答案:A
He was a young man of barely eighteen years, evidently country, and now, as it seemed, on his first visit to town.
A.brought up
B.bred
C.grown up
D.raised
问题描述:科目月末对账不平,但以前月份都平衡,反结账反记账到年初也有此问题.