题目

To see the world is one thing；to have someone to share it with is another. Indeed，travel becomes more interesting when you have a travel partner. A travel partner can be a close friend，a family member，a pal you've met online，or a business friend. You can have someone to talk to Traveling alone is fun，but wouldn't you feel lonely？Having a travel partner can remove the feeling of loneliness. This is especially true if you can get a travel companion who is very familiar with the place you're traveling to. You don't have to ask any information from the locals，and you can in15．如果两条平行线被第三条直线所截，那么同位角的平分线的位置关系是平行．