Balaram Katha book pdf class 6 hindi book pdf
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Emails are delivered extremely fast when compared to traditional post. Emails can be sent 24 hours a day, 365 days a year. Webmail means emails can be sent and received from any computer, anywhere in the world, that has an internet connection . Cheap - when using broadband , each email sent is effectively free.
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A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying. Because no light can get out, people can't see black holes. They are invisible.
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