2. 外语
  3. Our planet is like a bit spaceship. Our atmosphere acts【51】a shield against harmful radiation and space debris.【52】holds the air

Our planet is like a bit spaceship. Our atmosphere acts【51】a shield against harmful radiation and space debris.【52】holds the air

admin2012-02-27  91
问题     Our planet is like a bit spaceship. Our atmosphere acts【51】a shield against harmful radiation and space debris.【52】holds the air and people on the spaceship,【53】everything doesn’t float away. Each of us is an astronaut and our spaceship, the earth, provides our food and water. The sun is our energy【54】and without it we would not be able to survive.
    【55】every spaceship, the earth is a closed system. The only thing we receive from the outside is energy from the sun. Everything else must be used【56】again. We astronauts don’t seem to realize that this spaceship is the【57】one we’ve got. We【58】its resources and waste the energy the plants have stored from the sun. If we【59】our spaceship, we will destroy ourselves as well. Maybe if we look at the universe which surrounds us, we will appreciate our own spaceship more and take【60】care of it.
选项 A、abuse
B、utilize
C、adjust
D、accumulate
答案A
解析 上句讲人类似乎没有意识到保护地球的重要性，本题只有选abuse its resources“滥用地球资源”才能顺理成章，并与下半句waste the energy意为“浪费资源”合理搭配；utilize意为“利用”；adjust意为“调整”；accumulate意为“积累”均不符合题意。
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