为了激发学生学习科学的兴趣，老师在课堂上为大家做了一个“燃纸成铁”的趣味实验。将一张滤纸（组成元素为C、H、O）用FeCl3浓溶液湿润，在酒精灯上烘干后点燃，滤纸变黑、红热，最终生成黑褐色物质。老师告诉大家，黑褐色物质中含有单质铁。小阳同学对此进行了分析验证。
下列关于人在吸气时膈肌变化的叙述，正确的是（ ）
—Because there's noise and fewer cars there.
Sam's birthday is ____ on the ninth of January.
The pupils in our school like reading after lunch, most of ________ seated on the grass unless it rains.
