so-do-dat-o

北斗系统空间信号接口控制文件正式版。北斗系统基本服务性能如下：位置精度：平面 10米、高程10米；测速精度每秒0.2米；授时精度单向50纳秒；可提供双向高精度授时和短报文通信服务。通过广域差分和地基增强等手段，北斗系统服务 性能还可进一步提高，满足各类用户需求。(Official version of the the Beidou system space signal Interface Control Document. The Beidou system performance are as follows: position accuracy: plane 10 meters, 10 m elevation velocity accuracy of 0.2 meters per second timing accuracy of the one-way 50 nanoseconds provide two-way high-precision timing and short message communication service. By means of wide area differential and ground-based augmentation Beidou system performance can be further improved to meet the needs of all types of users.)

API查询软件，允许自己修改，和添加，API函数比较全(API query software, allow themselves to modify, and add, API function is relatively full)

开题报告ppt模板！毕业设计、论文答辩绝对有用！值得珍藏！(Opening report ppt templates! Graduation project, thesis absolutely useful! Worth collecting!)

说明：  最好用的PDF阅读器，已经破解，无需注册码，安装即可使用……(The best use of the PDF reader, have been cracked, no key, the installation can be used ... ...)

这个是代人传的办公自动化的阅卷的代码！希望对需要的人有用！(This is the office automation generation of marking code! Hope that useful to people in need!)

PDF文件格式进行介绍，对正在进行PDF二次开发的人员有一定参考价值。(Specification of PDF File Format)

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教会你如何管理时间，让你的一分钟变成一个小时(dfsdfgfdsgfdsgdfsg)

AS3991中文档、供初学者。仅供参考，不能为准、(AS3991 in the documentation for beginners. For information purposes only, not subject,)

excel 下合并当前目录下所有工作表到一张中