自教育部门户网站开设专题报道以来，“最美女教师”张丽莉舍己救人的事迹感动着全国。各地各校通过多种形式深入学习张丽莉老师的先进事迹，表示要以她为榜样，弘扬她见义勇为、无私奉献的高尚师德，实现人生价值。
请运用人生价值的有关知识回答：
三江源地区被誉为（ ）
在山地地区，人们通常优先建造成本较低、难度较小的铁路，其次才是公路。（ ）
阅读短文，判断正误。
Dear Joe,
How are you? My sister and I are having our holiday. Yesterday we went to the library. We got there by bus. We read storybooks and had lunch there. The food was delicious. It was cheap, too. We went shopping in the afternoon. I bought a pair of shoes. I was very tired. We are planning to learn skating and do many other things during the holiday. We are sure we'll have a good time.
How about your holiday? Please write to me soon.
Miss you.
Alice
