問題詳情

BWhike all my classmates seem to be crazy about a one-way ticket to Mars(火星), I'd rather say Mars is totally unsuitable for human existence. People won''t have enough food supplies ther, and the terrible environment would make it impossible for them to live a long life. Besides, the journey won't be safe. Can anybody explain to me just why people would go to Mars, never to return?Steve Minear, UKHere are the things you can think of: the desire to explore a foreign and unique environment, the excitement of being the first humans to open up a new world, the expection of fame and glory┅ For scientists there is another reason. Their observations and research will probably lead to great scientific achievements.Donal Trollop, CanadaThere are alreafy too many people on the Earth. I think that something before the end od the century, there will be a human colony on Mars. It will happen when people finally realize that two-way trips to the red planet Mars are unnecessary. Most of the danger of space flight is in the launches and landings. Cutting the trip home would therefore reduce the danger of accidents, save a lot of money, and open the way to building an everlasting human settlement on another world.Enough supplies can be sent on ahead, and every two years moresupplies and more people will be sent to the new colony. Mars has all the materials for a colony to produce or make everything it needs, and Mars is far more pleasant than the other plants in the outer space.Paul Davies, USA
60.The main purpose of Steve Minear's writing is .
(A)to report his classmates' discussion
(B)to invite an answer to his question
(C)to explain the natural state of Mars
(D)to show his agreement on going to Mars

參考答案

答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)

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