一、英语作文my pen pal

I have a pen pal, her name is Rose .She is from English,she is a student.She has long curly blank hair and two big blue eyes .She has a big family. Her mother is a nurse and her father is a cook,because,she want to be a doctor.She has a sister and a brother,they are friendly.She loves her big family.

二、请问PAL制式与DVB制式的是什么关系？

模拟电视信号的制式主要分为三大类PAL、NTSC、SECAM

DVB是数字电视信号的规范，数字电视信号最终还是要转化成以上的模拟电视信号才能播放出来

三、PBJ是什么文件,用什么软件可以打开PBJ文件

告诉你个网址 很实用的一个网址www.docspal.com能打开任何未知类型文件 只需上传上去 还提供各种类型的转换 相当实用