television signals are first changed into radio waves,which

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/17 02:58:01

television signals are first changed into radio waves,which are then sent from a station on earth to an orbiting satellite.
which are then怎么理解?

这个句子的意思是电视信号首先转换成无线电波,而无线电波接着从地球上的电台发送到运行的卫星上.
所以这个which are是个定语从句,修饰radio waves,which就指代radio waves.then跟first对应,表示然后,接下来.

英语作文Which one is better,television or radio? radio waves are similar to light waves except that their wav 一道阅读理解问题Radio and Television Radio and television are very p radio waves的意思 radio and television are important means of c___. Radio and television are important means of c_? radio,television and press are __of coveying news and inform Radio,telephone and television are widely used in the world. When television was first introduced into American society . 英语翻译Television,which made its first serious appearance in 19 英语翻译Digital signals which are used by computers are made up 一份英语任务型阅读Radio, telephone and television are widely used in