A.
一个波节两侧的质元振动具有相同的振幅;The vibration of the mass element on both sides of a node has the same amplitude;
B.
一个波节两侧的质元振动具有相反的相位;The vibration of the mass element on both sides of a node has opposite phase;
C.
一个波节两侧的质元振动具有不同的频率;The vibration of the mass element on both sides of a node has different frequencies;
D.
一个波节两侧的质元振动具有相同的相位;The vibration of the mass element on both sides of a node has the same phase;