今天的托福口语部分，展示下面这道机经第一题的示范答案：
Describe the differences between two cities that you have visited before.
描述差异的类型题，首先对于这两个描述的对象，同学们一定要选择具有明显差异的，不要给自己在有限时间内的构思徒增难度哦。
例如范例中的两个城市：北京，大连
I visited both Beijing and Dali last summer.
These two cities are totally different. Well, Beijing , the capital of china ,is flourished with historic sites and modern metropolis. So when you visit this city ,you must be attracted by its human landscape. With the efficient transportation of both public and private, the pollution is also heavy.
北京：历史，人文，现代大都市，都是它的标签。
However, Dali is a paradise of natural scenery , the lakes and green mountains. Tourists get a chance to take a break from the rest of the chaotic social life, from building and streets and stuff. And absolutely the air would be better concerned with relatively less vehicles.
大连相对来说是以自然风光闻名。所以侧重点一定是nature!是人们得以远离城市喧嚣的放松去处。
要注意的是，文中两段都提到了交通和其后带来的相对空气污染状况。这是difference题的另一个要点：前后内容一定要对应，这样既有利于构思，也会增效表达的逻辑性。
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