We should encourage scientific experiments by the masses themselves so as to generate steady technical progress and new production records.

 
  • 要廣泛開(kāi)展群眾性的科學(xué)實(shí)驗活動(dòng),做到在技術(shù)上、生產(chǎn)上不斷有新創(chuàng )造和新紀錄。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan