题目

某同学为探究浅黄色液体X(仅含三种常见元素)的组成和性质，设计并完成如图实验： 请回答如下问题： （1） X所含三种元素是。 （2） X在过量氧气中燃烧的化学方程式是。 （3） 溶液C滴在淀粉KI试纸上，试纸显蓝色，写出该变化中发生的离子方程式。 答案：【1】Fe、C、O 【1】4Fe(CO)5+13O2 点燃__ 2Fe2O3+20CO2 【1】2Fe3++2I-=2Fe2++I2情景交际：补全对话，每空一词。A: What do you think life will __1__ in 100 years?B: I think every home will __2__ a robot.A: Will there be __3__ paper money?B: No, there __4__. Everyone will have a bank card like visa.A: Will __5__ go to school?B: No, they'll study __6__ computers at home.A: How old will people __7__?B: The will live to __8__ 200 years old.A: Will people travel in spaceship?B: I think they __9__.A: Will the computers do the most of jobs?B: Yes, I think __10__. We needn't do lots of work as we do now.