1) The louder the sound the higher/lower the amplitude. a) higher b) lower 2) To make a loud sound, you need to use more/less force. a) more b) less 3) A whisper has a sound with a ___________ amplitude. a) high b) low 4) What is the unit of measure of amplitude? a) Hertz (Hz) b) Decibels (dB) c) Kilograms (kg)

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?