摘要：
\documentclass[letter,12pt]{article}\usepackage[margin=1in]{geometry} % set the margins to 1in on all sides\usepackage{graphicx} % to include figures\usepackage{amsmath}\usepackage{amscd} % great math... 阅读全文
posted @ 2009-08-04 09:34
王中胜
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