长沙签证中心地址:英语智力题

来源:百度文库 编辑:查人人中国名人网 时间:2024/05/10 11:49:54
Without a sound I speak,I am small,light and fast.I express others' thought,abd travel without feet.Who am I?

letter

optic signals

brain wave

e-mail...

信letter

voice (声音)

激光怎么会有声音捏》?