1: Wang XF, Zhang Y, Wu Y, Yu J, Xie MX. Identification and differentiation of the red ink entries of seals on document by laser desorption ionization mass spectrometry.
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Lesson 66 Sweet as honey!像蜜一样甜！ First listen and then answer the question. 听录音，然后回答以下问题。 What was 'sweet as honey' and why? In 1963 a ...
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EPA Web Application Access Login: Welcome to ICIS : A gateway for authorized users to find, request access and manage EPA tools, applications and communities.
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