题干

 化学源于生活又服务于生活,请用化学知识解释下列问题:

(1)走近花圃闻到花香,从微观角度解释是因为____ .

(2)喝了汽水后常常会打嗝,原因是____

(3)食物保存在冰箱中不易变质,是因为化学反应速率与____ 有关.

(4)用洗涤剂清洗沾有油污的盘子,是因为洗涤剂具有____作用.

(5)蚊虫的分泌物中含有一种酸性物质,人被叮咬后患处肿成大包而痛痒,可涂____ (填一种生活用品)减轻痛痒.

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分子在不断运动,温度升高气体溶解度减小,化学反应速率与温度有关,乳化,肥皂水

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    One of the many great lines in the movie Apollo 13 came from Ed Harris, who played NASA Director of Operations, Gene Kranz. The famous line was, “Gentleman, failure is not an option.” He said the words because he had a clear purpose that the three astronauts trapped in space must be sent home safely. The driving force behind their seeking of a solution was motivated by a true purpose.

    Here is the simple principle. If you have a big enough 'why' in life, you will always figure out the 'how.' A person without a purpose in life is like a boat without a rudder, floating aimlessly without a direction and going nowhere. In all walks of life, when referring to someone's success, we often hear the words “focus and determination”. But Merriam Webster defines the word “purpose” as the reason why something is done, a feeling of being determined to achieve an outcome. There are many talented and intelligent people in the world that are unsuccessful because they lack direction. I believe that our life depends on our purpose. Whether you're single or in a team, having a purpose allows you to start, evaluate, and improve your talents or abilities helps you find your path in life and achieve your success finally.

    A friend of mine once told me that the most motivating speech he had ever heard was just three short words. It came from his wife when she said, “Honey I'm pregnant.” He said those few words instantly motivated him because he now had a big “why” in his life, a purpose to work hard to support his family. In fact, when your “why” gets bigger, you get better because you stop holding back and you'll go all out. It's why you often hear about some great people perform superhuman actions when failure is not an option!