华东地区农村中学生劳枝竞赛于6月10—12日在上海举行。国家教委、江苏省教委和有关省市教委的部门负责人出席了闭幕授奖仪式。我市代表队在竞赛中大开眼界,受益颇深。八名队员中获一等奖的一名,获三等奖的四名,获优秀表演奖的两名。回顾几年来的劳枝教育,体会甚多,心有所得。果树的保护剂波尔多液的成分是硫酸铜、生石灰、水。其等量式比例 The East China Rural Laozhi Contest was held on June 10-12 in Shanghai. The heads of department of the State Education Commission, Jiangsu Provincial Education Commission and relevant provincial and municipal education commissions attended the closing ceremony. The city team opened their eyes in the competition and benefited a lot. One of the eight players won the first prize, four of the third prizes, and two of the best performing prizes. Looking back at the education of labor branches in the past few years, I learned a lot and learned what I have learned. The composition of the Bordeaux mixture, a protective agent for fruit trees, is copper sulfate, quicklime, and water. Its isometric ratio