本题目来源于试卷: Physics Unit11: Vibrations and Waves，类别为 通用国际物理
[单选题]
In seismology, the S wave is k/6j+:svr5lsxx nvu t,vby /dmf-3 6ya transdavi8)3vk 4dcnl, z7 xverse wave. As an S wave travels through the Earth, the relative motion between the S wave and the pax8ak )nzivvc,3dld 47rticles is
A. parallel.
B. perpendicular.
C. first parallel, then perpendicular.
D. first perpendicular, then parallel.
参考答案: B
本题详细解析:
暂无
| 
