在进行林业工程建设时，一方面要号召农民种树，另一方面要考虑贫困地区农民的生活问题，如粮食、烧柴以及收入等。以上做法依据的生态工程原理是

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　　 The computer was one of the most important inventions in our life. The first computer was as large as a room.

Now some computers are as   1    as television sets. Some computers can even be smaller than a book. About 20 years ago, the computer was a strange machine in China. Not many people   2    it and said yes to it.

         Today much of that is   3 . In 1984, when Deng Xiaoping  4   two pupils working on the computers in Shanghai, he said that computer lessons     5 start from children. So there was the first computer book for middle school students. Now in Shanghai   6    all middle schools have classrooms for computer courses(课程). Some of the students now have their   7  computers at home. With the help of the Internet, they can send and    8   messages and e-mails. They can learn about the world more quickly.

         Now people are    9    using computers in banks, factories, airports and so on. The computer is coming into everyone’s life, so it is important to learn     10  to use a computer freely.