题目

My teachers thought I was the worst student. My family also had the thought as my teachers.When I was going to give up my studying, a new teacher, Miss White came to our school. She was young, beautiful and knowledgeable (知识渊博的). One day, I was sitting in my classroom, There was nobody else here. Miss White came in and came up to me and talked to me happily. Soon her smileaway my unhappiness.“Do you think I can go to college?” I didn't why I asked such a question. I thought she must say “no”. everyone else said so. But she said, “Dear, you can do you want. Just try and 某同学学习了燃料的热值后，自己设计了一个实验来探究煤油和菜籽油的热值大小关系．他实验时组装了如图所示的两套规格完全相同的装置，并每隔1分钟记录了杯中水的温度（见下表）．（1）在安装、调整实验器材时，科学合理的顺序是（在甲图中）：先调整固定________的位置，再调整固定________的位置（选填“A”或“B”）． （2）为保证实验结论的可靠性，实验时应控制两套装置中相同的量有加热时间和水的________、________ ． （3）通过表中记录本的数据，你认为煤油和菜籽油两种燃料中，热值较大的是________ ． （4）该同学实验前用天平测出了烧杯中水的质量及两油灯中燃料的质量，并根据记录的数据，利用公式Q吸=cm（t﹣t0）计算出了水吸收的热量，他认为通过这些数据能准确地计算出煤油和菜籽油的热值．你认为他的计算结果可靠吗？________ ， 为什么？________ ．