Arkive
An extensive collection of thousands of videos, images and fact-files illustrating the world's species gathered into one centralised digital library.
http://Arkive.org/百度权重：
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收录时间：2024-11-07Earthobservatory
Explore the causes and effects of climatic and environmental change through the use of real satellite data.
http://Earthobservatory.nasa.gov/百度权重：
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收录时间：2024-11-15Truity
Offers descriptions of each of the 16 MBTI (tm) types, including both written material and video footage. Free and for fee testing services are available.
http://Truity.com/百度权重：
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收录时间：2024-11-19Thatquiz
Free math practice and testing site for students with complete class record keeping and grading for teachers.
http://Thatquiz.org/百度权重：
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收录时间：2024-11-19Mylanguageexchange
Language exchange learning via pen pals, text chat and voice chat using free lesson plans.
http://Mylanguageexchange.com/百度权重：
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收录时间：2024-11-07Cadence
Provides front-to-back design tools and services for all aspects of semiconductor design.
http://Cadence.com/百度权重：
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收录时间：2024-11-06Binaryhexconverter
Online tool for converting binary, decimal, hexadecimal and ASCII text.
http://Binaryhexconverter.com/百度权重：
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收录时间：2024-11-07Mt
Precision balances and scales, manufactures and markets related analytical instruments.
http://Mt.com/百度权重：
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收录时间：2024-11-06Illumina
Develops tools for the large-scale analysis of genetic variation and function. Products, biographies, careers, and contacts.
http://Illumina.com/百度权重：
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收录时间：2024-11-26Bio-rad
Manufactures and distributes products for a wide range of technologies including proteomics, real time PCR, electrophoresis, imaging, immunoassay, chromatography, microbiology, amplification, clinical informatics, microplate automation, immunofluorescence, molecular and cell biology.
http://Bio-rad.com/百度权重：
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收录时间：2024-11-06
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