阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

           We're human, and it's not always easy to get along with everyone all the time.Sometimes we hurt other people's feelings without intending to. Sometimes，we're ____(deliberate) mean and we feel bad afterward. So we apologize. Apologies are one of the tools we use to build good friendships andrelationships. ____ you say“I'm sorry” (and really mean it), it's because youprobably feel bad that something you did or said hurt the other person. Sayingyou're sorry is more than just words. You're also saying that you respect theother person  ____  you care about his or her feelings.Apologizing shows you have empathy.

     After  apologizing，you might feel alittle ____(good)．The other personprobably will, too. When you apologize in a caring way, you can feel goodbecause you are trying to make things right again.

     Some times a heartfelt“I'm sorry” ____(fix) everything right away. Other times，it might take  ____while for someone to get past feeling upset. You may need to give the otherperson some time. Even after you say you're sorry, you might still feel bad aboutwhat you said or did—but you can feel good about apologizing, fixing themistake, or making up your ____ to do better. When someone apologizes to you，you may welcome it and be ready to forgive  ____ happened and move on. Or you might not feel like being friendly againright away. If a person keeps hurting you and ____ (apologize)without making aneffort to change，you might not want tohang about ____  that person any more.

三大营养物质在消化道内被消化的顺序是（  ）

根据资料报道，世界上每年因锈蚀而报废的金属设备和材料相当于年产量的20%～40%，某实验小组对铁的锈蚀进行了如下探究．如图所示，将包有样品的滤纸包用大头针固定在橡胶塞上，迅速塞紧，观察到量筒内水沿导管慢慢进入广口瓶（净容积为146mL）．当温度恢复至室温，且量筒内水面高度不变时读数（此时瓶内氧气含量近似为零）．记录起始和最终量筒的读数以及所需时间如下表．

（1）金属腐蚀的过程实际上就是金属元素化合价____ （填“升高”或“降低”）的过程．

（2）实验①和②说明NaCl可以____（填“加快”或“减慢”）铁锈蚀的速率．

（3）实验开始后，广口瓶内温度有所上升，说明铁的锈蚀过程是____（填“放热”或“吸热”）过程．

（4）实验结束后取出滤纸包，观察到有红棕色物质生成，该物质的化学式是　____ ．

（5）实验①和③是探究碳对铁锈蚀速率的影响，请在表格空白处填写实验③的样品组成．

（6）该装置还可用于测量空气中氧气的含量，根据上述数据计算氧气的体积含量是　____ %（精确到0.1%）．试分析该实验结果出现误差的原因：____ （写出任意一条即可）．