化学是与数学、物理并列为理科的三大学科。化学学科既有理科的特点，就是概念性较强、前后知识联系紧密，又是理论、实验、计算相结合的一门有特色的学科。化学的另一特点就是记忆的成分较多，某些知识较零碎，而影响了知识的系统性和规律性。因此，大多数学生认为化学易... Chemistry is a three-university department that is tied with science and physics as science. The discipline of chemistry has the characteristics of science, that is, the concept is strong, the knowledge is closely linked, and it is also a unique subject combining theory, experiment and calculation. Another feature of chemistry is that there are more elements of memory, and some knowledge is more fragmentary, which affects the systematicness and regularity of knowledge. Therefore, most students think that chemistry is easy...