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 wam9may qzqnm). a95 r6 to (esf9b44zmwve is a transverse wave. As cz-6ti-f b wn4emqr.4 qvw+g8an S wave travels through the Earth, the relativevgm-weni4 r f4-+8q6z.tcq wb motion between the S wave and the particles 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
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