由两条以上走向大致平行而倾向相对的正断层组成的中间断块下降,两边断块相对上升的构造称为地垒。
参考答案:错
By using (26) , a 600M -byte music CD can be compressed to 50M bytes or less. It can be streamed (downloaded in chunks) so that you can begin listening to the opening bars while the (27) of the file arrives in the background. And, most important, the music files of this kind retain good listening (28) that earlier (29) schemes lacked. That (30) of features makes accessing and distributing music on the web practical for the first time.
A.compression
B.coding
C.transmission
D.playing
以下是一组洋务运动时期的言论:
材料一
材料二
结合材料一、二、三,说明洋务派办洋务的目的何在?