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[ZHY2018老师已批改] 托福写作——[综合+独立][tpo50]谢谢大哥们

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发表于 2018-7-6 11:37 |显示全部楼层
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Question:Summarize the points made in the lecture, being sure to explain how they respond to the specific concerns presented in the reading passage.The reading states that there are several problems that how to send humans to Mars. However, the lecture suggests that scientists have found solutions.

First of all, the reading suggests tnat the trip to Mars would take us almost two years to arrive destination, which is too long to carry enough water, food, and oxygen. Without these important supplies, a Mars mission is impossible. On the contrary, the lecturer states that scientists have already invented a technique to slove the problem. The technique is created in order to cultivate plants which can provide food supplies. Astronauts can use the technique to grow food crops. Also, the technique can raise water for human to drink. Besides, plants can release carbon dioxide that can clean air. Therefore, human in the ship have fresh air to breathe.

Second, the writers states that astronauts on the Mars mission have to face the difficult suitation that live in the zero-gravity environment of space for many months at a time. In this environment, the human boby will be harmed severely such as devreased muscle mass and lower bone density. However, the lecture suggests that scientists found the way to solve this problem. They did some experiments. Astronauts do regular exercises for some months in the zero-gravity environment, they can prevent from decreasing muscle mass. Also, they can slow the decreas of bone density if they have some special medicine.

Finally, the writers suggests that astronauts on a mission to Mar would have to resolve the high level of radiation from the sun. During the trip, the earth can not protect them with magnetic field and adding the shield to prevent from space radiation increase so much weight to the ship. On the contrary, the lecture states that the radiation from sun is not so dangerous. And the radiation is noly happening occasionlly. Scientist have invented a instruments to protech the ship from radiation which does not add too much weight.


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