题目

My 9-year-old daughter and I were flying from our home in Carolina to spend a week with my husband in Florida.We were__26_  about the trip because we hadn't seen him for five months, and __27 her Dad terribly. As usual on the Charlotte-to-Miami flight, the plane was totally__28. Because we did not get our boarding passes until we__29 at the gate, Kallie and I could not get seats together and were __30 by the aisle（过道）. I asked two passengers in my row if they would switch places with Kallie and me, __31 we could be together. They __32, saying they thought they should stay in 9．（1）早在春秋战国时期，我国就开始生产和使用铁器．用铁锅炒菜主要是利用铁具有良好的导热性，铁锅存放不当容易生锈，铁生锈的条件是与空气中的氧气和水蒸气接触．（2）实验室采用还原法制备新型材料纳米级铁粉，其流程如图所示：①纳米级铁粉在空气中易燃烧，其生成物的名称为四氧化三铁．②实验中通入N2的目的是防止铁粉与空气中的氧气接触自燃．③Ⅱ中反应的化学方程式为H2+FeCl2$\frac{\underline{\;高温\;}}{\;}$Fe+2HCl．