阅读王维《使至塞上》，选出分析有误的一项    (           )
单车欲问边，属国过居延。征蓬出汉塞，归雁入胡天。
大漠孤烟直，长河落日圆。萧关逢候骑，都护在燕然。

    When you are feeling unhappy or forget how great you are，these are six ways to make you feel good about yourself．
1) Look in the mirror (镜子) and say to yourself，“I am a special person and there's no one  in the world like me．I can do anything!” It may not sound so good，but it really works !
2) Do something nice for someone．Helping others always makes you feel good．
3) Smile! Be friendly to people you meet．Look for the good things in your friends and family．
4) Learn something new! Do you always want to decorate（装饰）your own room or learn how to swim? Go for it! New challenges (挑战) are fun and give you a sense of accomplishment when you have finished．
5) Read and start a diary（日记）．Turn off the TV and let your imagination (想象) fly! Write down your thoughts，dreams or anything you want! Writing always helps to express（表达）your feelings．
6) Stay with your family．We all need our family time．Talk with your Mum or Dad or maybe even your cousin．

甲、乙两辆汽车在平直公路上匀速行驶相同的时间，此时它们的速度之比是5：4，发动机的功率之比是3：2，则发动机的牵引力之比是（　　）

陕西是中华文明的发祥地之一，西安是享誉世界的历史文化名城。结合下图，回答问题。