直到1880年，英国才开始实行初等义务教育。Britain did not introduce compulsory primary education until 1880.对录像片内容实行了更为严格的监管。Stricter controls were placed on the content of video films.面包、大米和茶叶等日常必需品已实行配给。Staples such as bread, rice and tea...
Graphite and even its linear counterpart, poly ( p - phenylene ) are too insoluble, infusible, and brittle.石墨甚至其线性物 聚苯,过于不溶, 不溶和发脆.This paper introduces the CQ - 1 and NS - 916 type cleaning agent of infusible scale.对研制成...