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【多选题】
关于驻波形成的超声光栅,下列说法正确的为A.
液槽内距离等于超声波波长的任何两点处，液体的密度相同
B.
超声波在液体中传播时入射波和反射波迭加而形成驻波
C.
液槽内距离等于超声波波长的任何两点处，液体的折射率相同
D.
超声光栅的栅面在空间随时间移动
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