一般来说，古代文明的传播与发展大多以两种形式展开：和平往来与暴力冲突。它们共同贯穿于人类历史发展的全过程，相互交织构建了不同文明的乐章。请联系所学知识，完成下列问题：
（1）在古代，各国之间常有战争发生，请举出两次不同文明之间的重要战争。
（2）有人认为这些战争客观上促进了东西方文化交流。你是否赞成这一观点？
（3）和平往来在人类历史上是文明交往的主旋律。请以古代阿拉伯人为例，简要谈谈他们在东西方经济文化交流中起的重要作用。

【经济学常识】阅读材料，完成下列问题。

    建国初期，***在《论十大关系》中指出：“我国全部轻工业和重工业，都有约百分之七十在沿海，只有百分之三十在内地。这是历史上形成的一种不合理的状况。沿海的工业基地必须充分利用，但是，为了平衡工业发展的布局，内地工业必须大力发展。”

运用***关于沿海工业与内地工业之间关系的观点，说明应如何促进当前我国的区域协调发展。

    It was a short flight from Shanghai to Xi' an. Xi' an is one of the four great ancient capitals of China____over 3,100 years of history. Its ancient walls date from the Ming Dynasty and are the best ____ (preserve) in the world. There are bicycles for people to hire. It is ____(amaze) to ride along the walls to survey this fascinating city.

    The Tang Dynasty Music and Dance show is not to be missed, but my favorite is an art gallery, ____we can enjoy some beautiful artwork and learn how to write Chinese characters.

    Most tourists make____way to Xi' an to see the life-size terracotta warriors (兵马俑) and we were no  ____(difference). The collection, which shows the armies of the first Emperor of China, ____(remain) hidden until 1974 when they were discovered by a farmer sinking a well. Walking among the statues is forbidden unless you are a VIP — but there are plenty of souvenir____(shop) in which tourists can buy the replicas(复制品)of them.

    All too soon it was time____(leave). I really enjoyed my stay in Xi' an. It is indeed a place of interest worth____second visit.