论文部分内容阅读
今年全国高考理科综合卷Ⅰ化学实验题第28题与往年相比有了较大的创新,然而,28题作为实验大题仅仅只有13分,其中推出元素和写化学方程式就占了6分,真正属于实验知识的只有7分,选择题中也没有实验题的踪影。显而易见,今年化学试题淡化了对实验内容的考查。一、实验题美在何处1.命题意图,独具匠心使用氮气起到“一箭三雕”的作用,一是用作排空气(防暴、防氧化);二是用作保护气;三是用作防倒吸。可
This year, the 28th problem in the national college entrance examination science synthesis volume I chemistry experiment has a greater innovation than in previous years. However, 28 questions are only 13 points as the experimental topics, and the introduction of elements and writing chemical equations account for 6 points. Only 7 points truly belongs to experimental knowledge, and there are no traces of experimental questions in the multiple-choice questions. Obviously, this year’s chemistry questions have played down the test content. I. Where is the beauty of the experiment title 1. Propositional intentions, unique use of nitrogen to play a “one arrow and three sculptures” role, one for the exhaust air (anti-riot, anti-oxidation); the second is used as protective gas; three It is used to prevent suckback. can