题目

完形填空 Many people are interested in talking aboutlife in the future. Some people 1 that life in the future will be easier andmore comfortable. But others believe that it will be 2 and more difficult than now. As for me, I 3 the idea of the first team. First,as for education, people will have 4 education. This is because of technology (科技). E-books will replace (取代) common 5 and robots will replace teachers. Studentswill not have to go to school every day. They will 6 at home through online teaching and will findlearning more interesting. Second,people's 7 will improve. Technolog(1)煤是一种常用的化石燃料，家庭用煤经过了从“煤球”到“蜂窝煤”的变化，以前人们把煤粉加工成略大于乒乓球的球体，后来人们把煤粉加工成圆柱体，并在圆柱体内打上一些孔．请你分析这种变化的优点是：___________． (2)煤在燃烧时会产生许多污染物，为了减少煤燃烧时对环境的污染，可设法把煤转化成清洁的燃料．将水蒸气通过炽热的煤层可制得较洁净的水煤气(主要成分是CO和)，请你写出该反应的化学方程式________．煤气厂常在家用水煤气中特意掺入少量有难闻气味的气体，其目的是________．