[질문] *특 중일이학기오투과학174~177쪽답

174쪽1번부터2/↓,↑,↑/4,6/2,5/4/2,3/2,3,5/진폭5.파장4/진동수2,주기0.5/3,4,7/5/소리를전달하는매질이없어서/ㄷ,ㄹ/가-D,나-B/4/E-D-C-B-A/2/4/1/1초에천번