题目

I went to India for a 2-week vacation to visit my relatives. We stopped on a red light, and as always, there were a lot of activities outside the cars near the   41   . People walked in, between the cars    42    newspaper, water and a number of kids looked for a bit of charity from the car owners. It’s a familiar   43   in most poor developing countries.                      While we were   44   for the red light to turn green, I noticed a man outside a couple of   45   in front of ours trying to sell bottles of water. It’s    46  金属铁是一种常见的金属，能和Cl2、S、O2、H2O等物质反应，回答下列问题：（1）写出Fe与水蒸气在高温下反应的化学方程式 ，其中氧化剂是 ；（2）质子数是8，中子数是10的氧原子的符号是 ；（3）S2-的结构示意图是 ，H2O的电子式是 ；（4）把Fe粉投入到硫酸铁溶液中，写出反应的离子方程式 ；在高炉炼铁中，将铁矿石还原成单质铁的主要还原剂是 ，反应的化学方程式是 ．