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  5. 這題的ACD 要怎麼想
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這題的ACD 要怎麼想

0. 圖為某一時刻弦上橫波的波形,下列關於甲、乙、丙、丁、戊各點的敘述正確的是 (A)此圖若 為行進波,則甲、丙兩點的振幅最大 (B)此圖若為向右的行進波,則戊點的振動速度方向向上 (C)此圖若為行進波,乙與丁的振動速率最大 (D)此圖若為駐波,甲與丙的振動速度為零 (E) 此圖若為駐波,丁的振動速度恆為零。 1- 甲乙 丙 J 戊
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