复数$\frac{3+2i}{2-3i}=$（）

    It was a hot day in Bangkok (曼谷). I was walking out of the busy Grand Palace, and some 1Thai teens started asking me questions. Noticing that I was2, they were interested and wanted to know more.

    “Oh, so lonely!” they said to me when they learned I was,indeed,3 solo for the long journey. I smiled and shrugged. They didn't know I've 4 been alone.

    I'm surprised by how much more outgoing I've become. Instead of putting my5down and ignoring the person who may be6me on the sidewalk, now I smile and say hello.

    The only bad thing is the fleeting (短暂的) nature of the relationship one builds on the7. I've felt sad more than a couple of times over parting ways8a fellow traveler. But there are always9friends and possibilities just the next town over.

    Part of the10of taking this trip was the knowledge that I'd be doing this alone. At first, I tried to get friends to11with me for various legs of the journey. I asked close friends, then even not-so-close12, then slowly realized that I might never travel if I13around for a time when a friend of mine would be free to14me.

    If I was really going to do this, it would have to be alone.

    As it turns out, traveling alone is the best15I could have made. You always have to make16considerations for others when you travel with others. Sometimes, you have to do things you don't feel like doing.

    Solo travel is amazing. And really,17I truly want and seek out18, I am never alone. I always have a group. I never feel19. Sometimes, being alone forces you to reach out to people you might not otherwise have ever 20.

    So don't fear traveling alone. It's the best thing there is.

逆温现象

      太阳短波辐射能穿过大气层到达地球表面，一部分被地球吸收，一部分被反射回太空去．地球吸收太阳短波辐射能后，地球变暖，温度升高．它一方面以长波形式向大气辐射热量，一方面又以对流、传导方式把热量传送给大气．

       一般情况下，大气温度随着高度增加而下降．在数千米以下，总是低层大气温度高，高层大气温度低．大气层容易发生上下翻滚，可将近地面层的污染物向高空乃至远方输散，从而使城市空气污染程度减轻．可是在某些天气条件下，地面上空的大气结构会出现气温随高度增加而升高的反常现象，从而导致大气层层次结构稳定，气象学家称之为“逆温杉，发生逆温现象的大气层称为“逆温层乃．它像一层厚厚的被子罩在我们城乡上空，上下层空气减少了流动，近地面层大气污染物“无路可走“，越积越多，空气污染势必加重．

       导致逆温现象的原因有多种．在我国冬季，当寒流袭击过后，地面受冷气团控制，容易出现逆温现象．白天日照不足，地面增温缓慢，还会使逆温维持．夏天，海水温度较低，也会形成逆温．空气污染中毒事件大都与逆温有关．如果连续出现几天逆温，空气污染物就会大量积累，易发生空气污染中毒事件．可以说，逆温现象是雾霾形成的帮凶．

      这种逆温现象还会使物体反射的光，在冷暖更迭的逆温层中传播时发生扭曲，产生蜃景．据研究推测，当年的泰坦尼克号从温暖的暖流区驶入寒冷的拉布拉多洋流区，就处于一个逆温层中．事故发生前，观察员没有及时发现冰山，是因为平静的海面把实际地平线和错误的地平线之间的区域遮掩了起来，使冰山得以潜影遁形．在冰山大概只有一英里远的时候，泰坦尼克号的一名望员才拉响了警报，全力倒车（指向前航行的轮船，螺旋桨反转，产生与前进方向相反的推力），但也为时已晚．

       逆温现象也非一无是处，它对遏制沙尘天气，以及农业生产都有有利的一面．