储集层所具有的两个重要特性是()
A.孔隙性和渗透性
B.孔隙性和湿润性
C.生油性和储油性
D.生油性和渗透性
参考答案:A
It was the third time that the boy _________ late. So his teacher got very angry.
A.have been
B.was
C.had been
D.was being
蒂姆·波顿常常将歌剧和影视混合,这样做的作用是()。
A.烘托气氛
B.抒发情感
C.烘托气氛和叙事
D.铺垫故事背景