2. 专升本
  3. For thousands of years, people have looked up at the night sky and looked at the moon. They wondered what the moon was made of.

For thousands of years, people have looked up at the night sky and looked at the moon. They wondered what the moon was made of.

admin2007-12-11  50
问题     For thousands of years, people have looked up at the night sky and looked at the moon. They wondered what the moon was made of. They wanted to know how big it was and how far away it was. One of the most interesting questions was "Where did the moon come from?" No one knew for sure. Scientists developed many different theories, or guesses, but they could not prove that their ideas were correct.
    Then, between 1969 and 1972, the United States sent astronauts to the moon. They studied the moon and returned to the earth with rock samples. Scientists have studied these pieces of rock, the moon’s movements, and information about the moon and the earth. They can finally answer questions about the origin of the moon.
    Today most scientists believe that the moon formed from the earth. They think that a large object hit the earth early in its history. Perhaps the object was as big as Alars. When the object hit the earth, huge pieces of the earth broke off. These pieces then moved around the earth. After a brief time, the pieces came together and formed the moon.
    This "impact (撞击) theory" exposes many facts about the earth and the moon. For example, the moon is very dry because the impact created so much heat that it dried up all the water. The earth has iron in its center. However, the moon has very little iron in its center. This is because the moon formed from lighter materials that make up the outer part of the earth. Finally, the earth and the moon are almost of the same age: the earth is about 4.5 billion years old, while the moon is about 4.4 billion years old.
    No one can prove that something really happened billions of years ago. In the future, new information will either support this theory or show that it is wrong. For now, scientists accept the impact theory because it explains what we know today about the earth and the moon.
From the first paragraph we know that when people looked at the moon they______.
选项 A、wished to travel to it
B、enjoyed its beauty very much
C、wanted to know more about it
D、developed many theories about it
答案C
解析 本题为细节题，解题的关键在于第一段第三句： “They wanted to know how big it was and how far away it was．One of the most interesting questions was“Where did the moon come from?””。这个句子所要表达的就是“wanted to know more about it”。文章中虽然提到how far away it was，但并不是要说明选项A．wished to travel to it的含义。选项B．enjoyed its beauty very much在文章中根本没有提及；选项D．developed many theories about it在第一段中确有提及，但是这并非人们仰望月球的原因。因此选项C为正确答案。
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