rthe communist party of china was founded in 1921,since when

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rthe communist party of china was founded in 1921,since whengreat changes have taken place in China
该句的since when
怎么理解
since when 是定语从句吗
怎么分析

首先肯定,是定语从句.when 是关系副词,代替前面的时间1921,since when 一起在定语从句中做状语.
全句译文：中国共产党成立于1921年,从此中国发生了巨大变化.

rthe communist party of china was founded in 1921,since when In July 1921,the communist party of China national crisis,bo when was the People's Republic of China founded ? Communist Party of China酷爱暴力评价The Communist Party of China The People's Republic of China was founded in ___. it is over _______years since our Party was founded in 1921. It was in 1949 ___new china was founded.为什么要填when,怎么样才能填that Chinese Communist Party 和Communist party of China 中文有什么不一样 the central committee of the communist party of china policy reserch office of the communist party of china centra ( ) 11.Long _____ the Communist Party of China!