【查阅资料】

①亚铁离子遇具有氧化性的物质易被氧化成铁离子；

②硫酸亚铁晶体加热会失去结晶水，高温会继续分解产生金属氧化物和非金属氧化物；

③SO₂能使高锰酸钾溶液褪色．

【进行实验】

图1为某兴趣小组同学称取a克硫酸亚铁晶体样品高温加热，使其完全分解，对所得产物进行探究，并通过称量装置B质量测出x的值．

图2某实验室利用SDTQ600热分析仪对硫酸亚铁晶体（FeSO₄•xH₂O）进行热分解，获得相关数据，绘制成固体质量﹣﹣分解温度的关系图．

    With the new term ____ (approach）, Bertha Berger struggled to put on her blue jeans. She stepped on the bathroom scale（秤）. She had never seen such a high number on the little scale, so she decided to change. That day she threw out all the junk food in her fridge and went grocery shopping,____ (determine）to lose weight; she bought low, fat versions of all her favorite foods. She had two low - sodium（钠）bacon ____（sandwich）with a diet soda for lunch. The food contained over 1, 200 calories but had very little salt. For dinner she ate two turkey burgers with reduced - fat cheese____she had received over 2, 000 calories, Bertha felt that she needed a reward. Then for dessert she ate one low- calorie ice - cream sandwich. And ____ bed she ate a bag of baked potato chips, which she thought were____（healthy）than normal chips, even if they had ____ (rough) the same amount of calories. She dipped them in low - fat cream cheese. Bertha____（consume）around 6,500 calories that day, but she felt skinny. When she woke ____the next morning, she stepped on the scale. She couldn't wait to see how ____(success）her diet had been.

材料一：冬天，父亲砍掉了一棵树的枯枝。春天到了，他惊奇地发现树技上又萌发了嫩绿的新芽。于是他对孩子说：“当时我真的以为这棵树已经死了，树叶掉得精光，一点儿活力也没有。现在才知道，它确实还活着。孩子，不要忘了这个教训，不论处于何种险境，决不要事先就得出消极的结论。耐心等待，冬天会过，春天会到来。”
材料二：两名矿工到井下进行检修，不料遇到矿井塌陷，被困在井。也没有找到出路。虽然身陷绝境，他们并没有放弃生的希望。他们坚守着一定要活下去的信念。他们说：“现在我们能做的就是等待外面的人来救我们。没有吃、没有喝，我们都不怕，怕的是我们自己没有信心活下去。”九天八夜后，他们终获救了，创造了生命的奇迹。
结合上述材料，请你说说我们应该怎样珍惜自己的生命。

设计一个计算$1\times 3\times 5\times 7\times \cdots \times 99$的算法，并画出它的程序流程图.