Examinees are asked to write an argumentation.题目要求考生写一篇论说文.Therefore has certain non - objective factor to other examinees.所以对其他的考生有一定的 非 客观因素在.Ten of the examinees were failed.应考者有十名不及格....
过氧化苯甲酰 、 特别是偶氧二异丁腈不参加链移反应.Benzoylperoxide, and especially azobisisobutyronitrile, do not take part in transfer reactions.聚乙烯醇 的耐辐解可通地苄叉化和苯甲酰化提高.Poly ( vinyl alcohol ) has been protected against radiation by benzalation a...