盆地内具备充足油气源的4个基本条件的沉积区称为()。
参考答案:生油凹陷
It's exciting to be a chairperson, but I'm________ my ability to do all the extra work. [ ]
A. looking about
B. learning about
C. quarrelling about
D. worried about
再生系统置换流程可以从吸收塔处进入氮气。