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They are important both as a way of preserving history and a means of access for the public to study and learn about our government.

Learn about Elisha Otis, his biography, and the invention of the elevator. Look at the history of the elevator, its history, and what year it was...

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There are many online practice tests for the GED. You can also study online with this GED Study Guide from Study.com. This course allows you to work at your own speed.

Prepare for your ASCP exams with Study.com's comprehensive ASCP practice tests, courses, videos, & more designed to fit your learning style.

In this lesson, learn what energy transformation means, see various energy transformation examples and understand different types of energy...

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