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2011年全国初中化学素质和实验能力竞赛(第二十一届天原杯化学竞赛)已经落下了帷幕,全国各省各地陆续分别进行了初赛和省级复试,其主要目的在于激发中学生学习化学的兴趣爱好、选拔优秀化学人才.为培养优秀化学竞赛选手做初步筛选和准备工作,每年一度的天原杯化学竞赛试题质量高、突出知识的开放与应用、着重针对学生学以致用、科学探
In 2011, the National Junior High School Chemical Quality and Experimental Ability Competition (the 21st Tianyuan Cup Chemistry Competition) has come to an end. Various provinces across the country have successively conducted preliminary and provincial retests. Their main purpose is to stimulate the interest of middle school students in learning chemistry. Hobbies and selection of outstanding chemical talents. To prepare for the preliminary screening and preparation of excellent chemical contestants, the annual Tianyuan Cup Chemistry Competition has high quality questions, highlights the openness and application of knowledge, focuses on student learning, and applies scientific exploration.