2015年5月14日，印度总理在西安参观了大雄宝殿、大雁塔、玄奘三藏院后表示，玄奘法师的印度之行将印中两国人民很早就联系在一起。玄奘印度之行的重要目的是为了更好地研习(   )

例句：竹楼外形像一只孔雀，又像一顶巨大的帐篷遮掩于蓝天绿地之间。

在平面斜坐标系xoy中$\angle xoy=45°$，点P的斜坐标定义为：“若$\overrightarrow{OP}=x_0\overrightarrow{e_1}+y_0\overrightarrow{e_2}$（其中$\overrightarrow{e_1},\overrightarrow{e_2}$分别为与斜坐标系的x轴，y轴同方向的单位向量），则点P的坐标为$\left(x_0,y_0\right)$”．若$F_1\left(-1,0\right),F_2\left(1,0\right)$且动点$M\left(x,y\right)$满足$\left|\overrightarrow{M{F}_1}\right|=\left|\overrightarrow{M{F}_2}\right|$，则点M在斜坐标系中的轨迹方程为（   ）

    Teenagers can't afford to buy expensive gifts. So what do you do if you want to give gifts to the important people in your life? In fact, you don't have to spend much money on holiday gifts. There are many cheap ways to do that. Here are some make-it-yourself gift ideas to try:

To your mom and dad:

    You can clean the room, sing a song or write a letter to your mom and dad. You could also draw a picture if you like.

To your teacher:

    Sometimes students put their pocket money together and buy a teacher a holiday gift. Some kids would like to give their own gifts. You can send a nice card with the words of thanks inside. You might even write down the favorite things you've learned in the teacher's class this year. It will make the teacher feel happy.

To the kids who need a friend:

    The holidays are a good time to think about people who are lonely. Maybe there is someone in your class who doesn't seem to have any friends. Try to do something for this person. It could be giving a Christmas card or just chatting with him or her. It's a small thing, but it could mean a lot to him or her.