Chemistry.about
News articles, periodic tables, educational resources, newsletters, and annotated links.
http://Chemistry.about.com/百度权重：
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收录时间：2025-02-08Omniglot
Provides an introduction to almost all alphabets and other writing systems, details of hundreds of languages, and a large collection of useful phrases and multilingual texts.
http://Omniglot.com/百度权重：
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收录时间：2025-02-16Blockchain
Blockchain.info is a utility site for the e-currency Bitcoin. The site allows you to browse the bitcoin blockchain, view currency statistics and offers a free web based online wallet.
http://Blockchain.info/百度权重：
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收录时间：2025-02-16Cern
European organization for particle physics research. Includes overview, educational resources, visit booking form and news.
http://Cern.ch/百度权重：
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收录时间：2025-02-16greenwichmeantime
Complete guide to times in every time zone in the world.
http://Wwp.greenwichmeantime.com/百度权重：
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收录时间：2025-02-14Allaboutcircuits
Online book by Tony R. Kuphaldt on dc and ac electric circuits, semiconductor devices, analog and digital circuits.
http://Allaboutcircuits.com/百度权重：
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收录时间：2025-02-16R-bloggers
A center for R users to find and read bloggers who write about the statistical programming language, R.
http://R-bloggers.com/百度权重：
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收录时间：2025-02-15Sona-systems
Provides online subject pool management. Includes a list of features and customer testimonials.
http://Sona-systems.com/百度权重：
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收录时间：2025-02-16- 百度权重：
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收录时间：2025-02-13 kraken
Mainly a Euro and US Dollar exchange for Bitcoin and Litecoin, but also offers markets for several other cryptocurrencies and fiat currencies.
http://www.kraken.com/百度权重：
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收录时间：2025-02-16
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