题目1单选题
为使两个同方向振动的简谐振动相交后始终不振动,这两个简谐振动必须满足以下哪个条件( )A. 振幅不等,频率相同,相位差(位相差)为2<img src="https://tihai-oss-cloud.itihey.com/img/9e7b6b2a76935873bd1be978b0271c57.png">B. 振幅不等,频率相同,相位差(位相差)为<img src="https://tihai-oss-cloud.itihey.com/img/9e7b6b2a76935873bd1be978b0271c57.png">C. 振幅相等,频率相同,相位差(位相差)为<img src="https://tihai-oss-cloud.itihey.com/img/9e7b6b2a76935873bd1be978b0271c57.png">D. 振幅相等,频率相同,相位差(位相差)为2<img src="https://tihai-oss-cloud.itihey.com/img/9e7b6b2a76935873bd1be978b0271c57.png">