Scientists have been concerned about space junk for many years. Right now, the costs of the cleanup have been too great. Mr. Castronuovo says his system could be put in place for a much more reasonable amount of money.
语篇解读:太空垃圾是人类在太空活动中丢弃在太空中的物体,这些物体形成垃圾云之后将对人造卫星或飞船的飞行产生很大影响,科学家正在寻找清理太空垃圾的有效方法。
1.What does the underlined part “space junk” in Paragraph 1 refer to?
A.It refers to small pieces of things that were once bigger objects.
B.It refers to objects that survived the extreme heat through the atmosphere.
C.It refers to clouds that are made up of small objects in space.
D.It refers to all kinds of objects that have been left behind in space.
答案:D 细节理解题。从第二段第一句判断,space junk指人类在太空活动中遗留在太空的所有的物体,即“太空垃圾”。
2.What is mainly talked about in the passage?
A.Smaller objects come together to form clouds of space junk.
B.Human beings are responsible for space junk.
C.Space junk is a big problem human beings have to find ways to solve.
D.An Italian researcher has found a good way to remove space junk.
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