1.The giant, spherical spaceship mentioned in the passage is virtually the planet Earth.
2.According to the author, some persons have left the Earth and traveled into outer space within the past 25 years.
3.Scientists have already designed special space factories, which manufacture special products and tools for space use, such as medicine and perfect ball bearings.
4.According to the information of the passage, we can infer that if the Earth becomes too crowded or no longer suitable for men to dwell on someday, they’ll have to move into space.
5.The moon and the asteroids are alike with respect to their rich, valuable metals.
6.Ultraviolet light in space places scorches our skin as seriously as it does on Earth.
7.Even a short trip in outer space may do some damage to one’s brain.
1.[Y][N][NG]2.[Y][N][NG]3.[Y][N][NG]4.[Y][N][NG]
5.[Y][N][NG]6.[Y][N][NG]7.[Y][N][NG]
8.The reason some metal alloys can’t be made on Earth is that the heavier metals
together with the lighter ones.
9.In space, there is no atmosphere to filter out the sun’s energy. There is plenty of solar energy to be turned into , for creating comfortable living conditions.
10.According to the author, will be caused to a man in gravityfree space.
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