题目

I had just started my second year studying at Cambridge University when I was faced with the news I had never expected. A lump in my neck ______ out to be cancer. I would ______ six months of chemotherapy (化疗).After the shock, I was struck by this thought: my ______ didn’t have any room for cancer. I had so much I wanted to ______ and so many goals I wanted to chase.I was faced with the ______ job of telling my friends and family. Then, I had to decide whether to ______ in Cambridge and take five exams at the end of the year. My doctor ______ against it, and so did my parents and teacher某学习小组同学想研究酒精灯烧水时的热效率．他们用酒精灯给100g的水加热，经过一段时间测得水温升高了60℃、消耗了4.2g酒精．已知：水的比热容为4.2×103J/（kg℃），酒精的热值为3×107J/kg．求：（1）此过程中水吸收的热量；（2）4.2g酒精完全燃烧放出的热量；（3）酒精灯烧水时的热效率．