两个同频率正弦量的相位差与计时起点的选择有关。（   ）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69472' and id < 4500104 and id<>'4500104' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69472' and id > 4500104 and id<>'4500104' order by id asc limit 5