具备能使石油、天然气在孔隙中运移、聚集和储存的岩层叫()。
A、盖层
B、储层
C、遮挡物
D、生油气层
参考答案:B
Columbus had accomplished one of the most amazing and courageous________in history.
A.performance
B.feats
C.events
D.acts
连队、科室党支部()召开一次支部委员会