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　托福綜合寫作回憶和解析含范文   本文由培頓 教育?天津學校儲楚老師整理提供

　　綜合點評

　　本次考試的綜合題目和獨立題目，難度較低，綜合寫作雖然不是以往重復過的題目，但是有過類似話題，也是天文話題中非常常見的議題，建議學生多關注一些學科類課外知識，對理解題目會有一些幫助。獨立任務更是常見討論的話題，所以大家積極去刷以往的真題，多拓展思路，精準審題，豐富展開例證，祝取得好的成績。

　　綜合寫作

　　話題分類天文

　　考題回憶總論點火星上的反復出現的條紋是否由液態水造成

　　閱讀部分1. 更大的可能是由隕石撞擊造成的

　　2. 火星上氣溫低于負70攝氏度，液體水會凍住

　　3. 探測器采集火星表層標本沒有發現液體水的成分

　　聽力部分1.reoccurring streaks每年流過exactly same position，然而soil and rocks 不是靜止不動的，但液體水每一年都流過同樣的path，所以更有可能是

　　液體水造成的

　　2.火星上的水是salty water，可以在更低溫度下維持液體狀態

　　3.探測器只在表面采集樣本，而液體水都滲透到地下與泥士混合，所以有可能是探測器的采集深度沒有采集到水而已。

　　解題思路閱讀部分仔細看，很多時候能夠給我們一些聽力內容方面的提示。

　　聽力的細節一定盡可能的給全。

　　參考范文Both reading and listening talks that the formation of reocurring streaks on Mars is because of the liquid water. According to the reading, there are three reasons of it, yet the professor in the listening casts doubt on the statement in the reading.

　　First, the reading points out the fact that it’s very likely that the metrorite impacts caused the reoccurring water on Mars. Yet the listening part explains that the reoccurring water has flown over the exactly same position every year, while soil and rocks brought by the impact will stay still, indicating that there won’t be any flowing path left on the surface of Mars.

　　Second, the passage presents that the liquid water will be frozen since the temperature on Mars is lower than minuns 70 celsius degree. However, the listening makes it clear that water on Mars is salty water, which means it remains liquid under even lower temperature. So it’s possible that the reocurring streak is formed due to liquid water.

　　At last, no signs of liquid water have been dectected by the probe when collecting samples on the surface of Mars. But the professor mentions that sample collecting is only operated on the surface of the planet, while liquid water will penetrate into the underground soil and mix with the dirt. Therefore, the depth that the probe reached was probably not enough to detect water.［230］