It's (relatively) simple to re-create the paper plane that set the flight-duration record. Use a letter-size sheet.
折一架创造了最长飞行记录的纸飞机还是相对简单的，只要一张信纸大小的纸就可以。
2
Notice that the generate-pdf-file mode USES the page-size parameter to set the page size correctly (we generate both a letter-sized and A4-sized PDF files).
注意：generate - pd f - file方式使用page - size参数来正确设置页面大小(同时生成letter和a 4两种大小的pd f文件)。
3
A set of "summary" equations and notes, no longer than 3 single sided letter-size pages for the hour exams and 12 (cumulative) pages for the final, can be used in these exams.