Since the 1980s, choral music has had a hard struggle to survive, although many composers have continued to make experiments in this field.
80年代以来，合唱艺术面临着严峻的生存环境，但许多作曲家仍在这个领域苦苦探索。
The essay probes some problems that students make experiments in chemistry and analyzes the reasons and puts forward some views on how to improve the teaching quality of analytical chemistry.
前言：本文列举了分析化学实验中学生容易出现的问题，分析了问题产生的原因，对如何提高分析化学实验教学质量，提出了自己的看法。
The essay probes some problems that students make experiments in chemistry and analyzes the reasons and puts forward some views on how to improve the teaching quality of analytical chemistry.
前言：本文列举了分析化学实验中学生容易出现的问题，分析了问题产生的原因，对如何提高分析化学实验教学质量，提出了自己的看法。
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