大学MOOC 专业英语(开封大学)1450995172 最新慕课完整章节测试答案
Unit5Chemicalreaction
Aquizforlecture2
1、填空题：
The factors that affect reaction rates are:
答案: 【 surface area of a solid reactant;
concentration or pressure of a reactant;
temperature •nature of the reactants;
presence/absence of a catalyst;】
2、填空题：
The changes of chemical reactions include:
答案: 【 molecule changes;
changes in energy】
Aquizforlecture3
1、填空题：
What is a reactant?
答案: 【 The substances undergoing reaction】
2、填空题：
What is a product?
答案: 【 The substances generated by the reaction】
3、填空题：
What is a coefficient?
答案: 【
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