document.write(""); document.write("
"); document.write(" [网上实验预习]  "); document.write("
"); document.write("
"); document.write(" [网上仿真实验]  "); document.write("
"); document.write("
"); document.write(" [网上实验选课]  "); document.write("
"); document.write("
"); document.write(" [实验成绩查询]  "); document.write("
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