油气藏中的流体的重力作用下,是垂直分带分布,气最轻占据在圈闭(),油居(),水在,油气之间的分界面称(),油水之间的界面积()。
参考答案:顶部、中下、油气界面、油水界面
He came home late. You _____him do that, he _______. [ ]
A. shouldn't have let; might have got lost
B. shouldn't let; might get lost
C. shouldn't have let; might get lost
D. shouldn't let; might have got lost
真菌从植物表皮侵入是如何克服各种障碍的?