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以冶铝的废弃物铝灰为原料制取超细α­氧化铝,既降低环境污染又可提高铝资源的利用率。已知铝灰的主要成分为Al2O3(含少量杂质SiO2、FeO、Fe2O3),其制备实验流程如下:

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    When people introduce themselves,  I always hear them say "I'm just ahousewife".  I don't understand whytheir introduction is always filled with regret and self - pity.  Is it, really a crime to be a housewife? Isit really embarrassing when you choose not to work outside and instead chooseto work in  your home?

    How could you be "just ahousewife" when the basic social unit of society depends on you and yourservice? A housewife works for the longest hour, supporting your husband, childstudies, caring for eld-ers, managing finances, paying bills, grocery shopping,cooking according to individual taste, cleaning, etc. A housewife could beanyone: daughter, wife, mother, teacher, financial advisor, fashion designerand nurse, gardener, driver, cook, and so on. Don't think you are not being paid for it.  You get the re-ward that no money canoffer-the love and affection of your family, their trust in you, ahappy home and your own satisfaction.

    It is you who choose to be in thisoccupation, willingly or for any other reason. After a busy day, all wait to return to the comfortable home set by you.They know you will be there to absorb all their stress and tiredness and relaxthem. Would the life have been the same had you been working outside to earnsome money? Would you along with your family have been able to buy all thecontent in life that you are enjoying now with that money?

    Respect yourself for what you are. Introduce yourself to the world with the same dignity. The world understandsthe importance of your job; it's time to make them accept it. Introduceyourself with pride and with twinkle in your eyes "I am a housewife".Kick that "just" out.