（Ⅰ）已知在极坐标系（与直角坐标系xOy取相同的长度单位，且以原点O为极点，以x轴正半轴为极轴）中，点P的极坐标 $\left(2\sqrt{2}，\frac{3\pi }{4}\right)$ ，判断点P与直线l的位置关系；

（Ⅱ）设点Q为曲线C上的一个动点，求它到直线l的距离的最小值．

    Annie Oakley was born in 1860 in Darke County, Ohio. Her family was very poor. She decided to help family even when she was young, so she learned to use a gun, and began hunting animals for food. She could shoot them without losing the important parts of the meat.

    Soon her shooting ability became well known. When she was sixteen, she was invited to a competition with a famous marksman(神枪手) , Frank Butler. Annie surprised everyone by winning the competition. Later that year she and Frank married.

    In 1882 Annie Oakley and Frank Butler started putting on shows together. Frank Butler was the star of the show and she was his assistant. The famous native American leader, Sitting Bull, thought so highly of her shooting ability that he called her "Little Sure Shot". Later Annie Oakley became the star of the show and Frank Butler was her assistant. Posters （海报）for the show called her the "Champion Markswoman".

    During World War I, Annie Oakley wanted to train a group of women volunteers for the army, but the United States did not accept it. She gave American soldiers shooting lessons, and traveled across the country visiting many training camps. She gave shooting performance and raised money to support the American soldiers.

    Annie Oakley died on November 3, 1926. Eighteen days later, Frank Butler died too.

化学与生活密切联系，生活中处处有化学．请你根据所学化学知识回答下列问题：

（1）从分子的角度解释，“酒‘香’不怕巷子深”的原因是____ ．

（2）在焙制糕点时常需加入一种名为“泡打粉”的膨松剂，其主要成分是NaHCO₃，俗称____．

（3）淀粉发酵后可生产乙醇（C₂H₅OH），乙醇是一种清洁能源，其燃烧的化学方程式为：____ ．

（4）吸烟有害健康，烟草燃烧时产生的烟气中含有一种能与血红蛋白结合的有毒气体，它是____ （填化学式）．

（5）在轿车的车箱内放入几包活性炭便可减少其中的异味，其原理是利用了活性炭的____．

蝴蝶在飞行时不停地扇动翅膀，但我们不能听到蝴蝶飞行的声音，这是因为（   ）