1) Hz stands for a) Hertz b) Wavelength c) Meters d) Frequency 2) Wavelength is measured in a) Hertz b) Meters c) Millimeters d) Miles 3) The top of a wave is called the a) Crest b) Trough c) Wavelength d) Frequency 4) The bottom of a wave is called the a) Crest b) Trough c) Wavelength d) Frequency

Wave features

列印
嵌入

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?