Physics Unit12: Sound (id: d88c39de4)

本题目来源于试卷: Physics Unit12: Sound，类别为 通用国际物理

[单选题]
Pressure and displacement/-d wnex7a suaxtc 5/0 waves xi:sqz 2ldi 7l.dhh* h5sd1,tare

A. in phase.
B. $45^{\circ}$ out of phase.
C. $90^{\circ}$ out of phase.
D. $180^{\circ}$ out of phase.


参考答案:  C


本题详细解析: 暂无

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