判斷題
單項(xiàng)選擇題
A.影響B.決定C.改變D.定奪
A.28dB.30dC.40dD.14d
A.0.7B.0.8C.0.9D.0.99
A.60°B.70°C.80°D.90°
A.100B.120C.130D.150
A.20B.30C.40D.50