经过偏移或偏移叠加处理的时间剖面，可以反映反射层的构造形态和位置，利用（）和（）之间的关系，即可将时间剖面转换为深度剖面。
参考答案：垂直时间；平均速度
— I don't want to move to that city. It is heavily polluted.
— Pollution is common. The city here is ________. [ ]
A. no less clean
B. not cleaner
C. no cleaner
D. not less clean
亮叶期
