正弦量的振幅值是指 （     ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68474' and id < 4421062 and id<>'4421062' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68474' and id > 4421062 and id<>'4421062' order by id asc limit 5