题型:选择题 I was told that there were about 50 foreign students _ Chinese in the school, most were from Germany. [ ]A. study ; of whom B. study ; of them C. studying; of them, D. studying ; of whom 查看答案
题型:填空题 汽车发动机上的散热器用水作为冷却剂,这是利用了水的比热容较大的性质;如果散热器中装有10kg的水,在温度升高50℃的过程中,水吸收的热量是 J;这些热量相当于完全燃烧 kg的天然气放出的热量.(q=7×107J/kg) 查看答案