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在农业生产中,常用氮肥来增加粮食产量,其中碳酸氢铵是常见的化肥之一.请完成下列计算.
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      Have you ever asked your relatives or friends if there is Wi-Fi in their houses? Have you ever searched for Wi-Fi when you are at restaurants or hotels? The answers will probably be "Yes". Most of us want Wi-Fi everywhere as if we can't live without it. But we can only use free Wi-Fi in some public places. We still have to spend some money accessing(连接)the Internet at most time. Here comes a piece of good news.

      A rich, powerful organization in the USA called the Media Development Investment Fund (MDIF) has decided to change the age of online computing (计算) completely by giving free Wi-Fi to every person on Earth. They will send up hundreds of satellites into low Earth orbit(轨道)in 2015.

     This is because they have made a survey and found that only 60% of the world's population have been able to get information on the Internet. And this is also because many countries are unable to offer people the necessary infrastructure(基础设施)to access the web.

We can expect to use free Wi-Fi everywhere in the near future.

 Present situation

____of us want Wi-Fi everywhere as if we can't live ____ it.

●Accessing the Internet ____us some money.

What the organization will do

●MDIF has made a ____ to send up hundreds of satellites into low Earth orbit in 2015 so that for every ____ on Earth, there will be free Wi-Fi ____.

____

●Only 60% of the world's ____ have been able to get information on the Internet.

●Many countries can't ____ people with the necessary infrastructure to access the web.

What we can expect

●Free Wi-Fi will ____ the world in the near future.