document.write("<div class=\"prevBox\"><div class=\"prevBtn\"></div><p><a href=\"/story?sid=72112\">物理学家发现超导石墨烯结构“家族”</a></p></div>");document.write("<div class=\"nextBox\"><div class=\"nextBtn\"></div><p><a href=\"/story?sid=72114\">奥密克戎亚型毒株BA.5成为美国主流毒株</a></p></div>");