题干

下列事实中能证明碳的非金属性比硅强的是(   )
①往Na2SiO3溶液中通入CO2产生白色沉淀
②石墨是导体,晶体硅是半导体
③制玻璃过程中发生反应Na2CO3+SiO2 __  Na2SiO3+CO2
④CH4比SiH4稳定.

A:①④

B:②③

C:③④

D:①②

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A

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How to Be Healthy and Happy

    We all want to be healthy, happy, free of stress and more productive in life.

    ⒈Get enough sleep. It not only keeps you healthy but also you will be happier. It is said that “Early to bed, early to rise makes a man healthy, wealthy and wise.”____

    ⒉Drink plenty of water. ____ The benefits of water are amazing. Water helps keep your skin clear, leaving you feeling happier and better about your body. Water is just simply an amazing source in itself for your overall health. Try to drink 8 glasses a day.

    ⒊Smile and laugh. Don't get sad over small problems or take any joke seriously which hurt you. Instead, if you feel so hurt, you prefer to stay away from that friend. ____ Respect your friend from a good perspective. Smile and laugh all the time and you will be happy.

    ⒋____Help your mom do the dishes, help out your dad in the kitchen, clean your room, or do anything that could help your family. It will not only make them love you more, but you will feel happy knowing you have done good even if you moved out twenty years ago and are a father yourself.

    ⒌Have goals. Always believe you can achieve. If you can dream it, you can achieve it, no matter what. ____ Organization plays a very important role in achieving goals, so organize yourself.

A. Help out your family.

B. Don't get in touch with him/her.

C. So make sure you go to sleep earlier.

D. Of course keep goals and dreams realistic.

E. Water is good for everything in your body.

F. The majority of our body is made up of water.

G. However, don't show him that you don't like him.