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Language call be defined as a tool______(人类相互交流所使用的) ．

【参考答案】

by which human beings communicate with one another/which hum......

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Which of the following best describes the passage as a whole
A．The origin of Species is a very significant book.
B．Darwin’s discoveries were proved to be right though the origin of Species was severely attacked.
C．The evolution of men has gone through a very long process.
D．It was impossible for Darwin to prove his ideas only with the aid of fossils.
填空题
O
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