什么是生油层系?
参考答案:
在一定地质时期、一定地质构造及古地理条件下,一系列生油层和非生油层有规律的组合叫生油层系。
—Do you still remember the first time we met, Linda?
—Sure. You a meeting in our classroom.
A.were addressing
B.had addressed
C.addressed
D.address