新航道

  在托福写作练习过程中，相信TPO材料中的作文题目都会是大家的首选练习材料。上海新航道托福小编给考生们带来了托福TPO50独立写作文本+音频下载，希望可以帮助广大托福考生轻松备考托福。

  托福TPO50独立写作文本及范文下载(含阅读+听力+范文)

  托福TPO50独立写作文本-阅读部分

  Scientists are considering the possibility of sending humans to Mars in the coming decades. Although there have been successful manned missions to the Moon in the 1960s and 1970s, Mars is 150 times further away from Earth than the Moon is. Thus the project of sending humans to Mars would require solving an array of problems the Moon missions did not have to face.

  One problem is that a round-trip to Mars and back is likely to take at least two years. The trip to the Moon lasted only a few days, and it was easy to bring enough supplies of food, water, and oxygen; but the cargo capacity of space vehicles is too limited to put on board the food, water, and oxygen required by a crew for a period of two years. Without those essentials, though, a Mars mission is impossible.

  A second problem is that astronauts on the Mars mission would be in the zero-gravity environment of space for many months at a time. Spending a long time in the zero-gravity environment has negative effects on the human body, such as decreased muscle mass and lower bone density. Over the course of a two-year mission, the effects would be so severe; they would make it impossible for humans to make the trip without experiencing grave medical problems.

  Finally, astronauts on a mission to Mars would be exposed to dangerous levels of space radiation, much of which comes in the form of charged particles emitted by the Sun. Earth's magnetic field, which normally protects us from dangerous solar radiation, would not be able to protect a spaceship traveling in interplanetary space. Constructing a shield that would protect the whole spaceship from space radiation is at present impossible because it would add too much weight to the ship.

  Directions: You have 20 minutes to plan and write your response. Your response will be judged on the basis of the quality of your writing and on how well your response presents the points in the lecture and their relationship to the reading passage. Typically, an effective response will be 150 to 225 words.

  Summarize the points made in the lecture, being sure to explain how they respond to the specific concerns presented in the reading passage.

  托福TPO50独立写作文本-听力音频

  TASK2

  Do you agree or disagree with the following statement? All university students should be required to take history courses no matter what their field of study is. Use specific reasons and examples to support your answer.

  托福TPO50独立写作文本-听力音频

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  以上就是小编为大家带来关于托福TPO写作资料供大家阅读参考，新航道托福资料频道将第一时间为考生发布最全、最新、最专业的托福资讯及托福考试资料及机经.

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