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| 发布时间：2006-12-6 15:49:29 | 信息来源：本站原创 | 浏览： | |
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tasks that require logical reasoning, so their intelligence is
unquestionable.Furthermore, fossil evidence reveals that they have had
their larger brains for thirty million years, compared to around a million
years for man.
The dolphin ancestors lived upon the land, and dolphins are
mammals（哺乳动物） like us, they feed their babies on milk, and breathe air
like us. They appear to care for each other, for example if a dolphin is
ill, its companions will help it up to the air so that it can breathe. The
sounds they make also appear to be some kind of communication.
It seems that we have discovered an animal that may be close to us in
intelligence, and furthermore one that is friendly, co-operative,and which
has emotions similar to our own. How do we treat these animals? So far man
has killed six million dolphins, and every year tens of thousands more are
killed.
26. Which of the following statements best expresses the main idea of
the passage?
A．Dolphins are human beings' best friends.
B．Dolphins have larger brains than that of human beings.
C．Dolphins are as clever as human beings.
D．Dolphins are quite close to human beings in many ways.
答案： D
［解析］此题是要旨题，提问的是文章的中心大意。就自学考试而言，文章或段落的主旨通常以主题句的形式出现。那么如何辨别主题句呢？文章的主题句一般是文章的第一句，但有时也出现在文章的中部或甚至文章尾部。本篇文章的主题句即出现在第三自然段的开头。在这篇文章中，作者在第一自然段中谈到了海豚的智力跟人类的十分相似，在第二自然段中又谈到海豚的生活方式跟人类的也有很多相似之处。故D是正确答案。
27．We can learn from the first paragraph that ______ ?
A．Dolphins have smaller brains than that of men.
B．Dolphins have had their intelligence not as long as men.
C．Dolphins have had their intelligence thirty times as long as men.
D．Dolphins are much more clever than men.
答案：C
［解析］这是一个细节理解题，考的是第一自然段中的一个细节。第一自然段的前部分讲到“Dolphins’brains are 30 percent
larger than those of people, and are equally
complex.”（海豚的大脑比人类的大30%，而且跟人类大脑的复杂程度差不多），故A），D）均不正确。第一段最后一句话讲到“fossil（化石）evidence
reveals that they have had their larger brains for thirty million years,
compared to around a million years for
man.”（从海豚的化石证据显示，他们拥有这么大型的头脑已有3千万年的历史了，而我们人类的头脑只有一百万年的历史。）C为正确答案。
28．It can be inferred from the passage that_____.
A．Dolphins' brains are much larger and more complicated than that of
men.
B．Dolphins are able to display the ability of reasoning.
C．Dolphins can play music like human beings.
D．Dolphins often held their babies up to breathe fresh air.
答案：B |
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