有一种土，测得其粘聚力c=9.8kPa，φ=15°。当该土中某面上荷载作用产生的σ=

Guo Liqin, 24, works as a primary school teacher in a distant area in Yunnan Province. The Internet offers him the latest news and entertainment from the outside world. And many people like him also depends on the online libraries for the free literature(文学) reading.

A survey in China last year found the online literature is the biggest growth area of Internet entertainment.

Reading for free is also popular in other countries. See what solutions other countries are taking.

Public Libraries

In countries such as Germany, Canada, and the UK, governments pay the authors to have their books in public libraries.

The pay is different from country to country. Some pay according to how many times a book has been borrowed; others pay according to whether the library has bought the book or not.

Google Books

Google Books allow users to see some free parts before buying them.

The author can choose to make from 20% to 100% of the book’s content(内容) for free reading . But you can see a full view of books that are out of copyright(版权).

E-magazines

E-magazines are usually about pop culture, and make money through advertisements. The writers are usually paid by the numbers of words they write.

Digital Library

There are many free online libraries of books which are no longer in copyright.

American and European websites offer classic(古典的) literature and non-fiction texts like dictionaries for download in different languages.

小题1:Guo Liqin depends on          for free reading.

A．online libraries

B．city bookstores

C．school libraries

D．borrowing books小题2:From the passage we know other countries are taking           solutions for reading for free.

A．3

B．4

C．5

D．6小题3: In some countries, the authors are paid by            to have their books in public libraries.

A．advertisements

B．readers

C．governments

D．the word numbers小题4: Google Books and Digital Library allow users to read the full books           .

A．which are out of copyright

B．which are in copyright

C．which are about pop culture

D．which have some free parts小题5:The best title of the passage is          .

A．Enjoy Reading

B．Learn How to Read

C．The Importance of Reading

D．How to Read for Free

原始生命的摇篮是（　　）

A．原始的海洋

B．原始的陆地

C．原始的大气

D．原始地森林

速度是描述物体运动快慢和方向的物理量。

科学归纳法