[填空题]

Historians and philosophers agree that ever since the development of agriculture, human beings have had art effect on the natural habitat (动植物生息地) of many plants and animal species. As human populations have increased, as many as 6,000 species are disappearing each year. A number 10,000 times greater than before man appeared on the planet. In one day alone, say scientists, some 45 kinds of plants and animals will die, some 17,500 species will be wiped out.
In 1977, the United States Congress took an important step to help the ever - increasing number of endangered species. With the enforcement of the Endangered Species Act, some species have gained more public recognition than others. Elephants and whales, for example, have received far more media attention than have the smaller, less known, and less attractive species that are also endangered. Yet it is the tiny species, such as bugs and bacteria, that keep the planet in balance. Scientists are becoming even more concern

[填空题]

Historians and philosophers agree that ever since the development of agriculture, human beings have had art effect on the natural habitat (动植物生息地) of many plants and animal species. As human populations have increased, as many as 6,000 species are disappearing each year. A number 10,000 times greater than before man appeared on the planet. In one day alone, say scientists, some 45 kinds of plants and animals will die, some 17,500 species will be wiped out.
In 1977, the United States Congress took an important step to help the ever - increasing number of endangered species. With the enforcement of the Endangered Species Act, some species have gained more public recognition than others. Elephants and whales, for example, have received far more media attention than have the smaller, less known, and less attractive species that are also endangered. Yet it is the tiny species, such as bugs and bacteria, that keep the planet in balance. Scientists are becoming even more concern

[单项选择]Which of the following philosophers ever mentioned the term Semantics first（　）.
A. Socrates.
B. Aristotle.
C. Plato.
D. Michel Breal.

[单项选择] For most thinkers since the Greek philosophers, it was self-evident that there is something called human nature, something that constitutes the essence of man. There were various views about what constitutes it, but there was agreement that such an essence exists -- that is to say, that there is something by virtue of which man is man. Thus man was defined as a rational being, as a social animal, an animal that can make tools, or a symbol-making animal. More recently, this traditional view has begun to be questioned. One reason for this change was the increasing emphasis given to the historical approach to man. An examination of the history of humanity suggested that man in our epoch is so different from man in previous times that it seemed unrealistic to assume that men in every age have had in common something that can be called "human nature". The historical approach was reinforced, particularly in the United States, by studies in the field of cultural anthropology (人类学). T
A. have some traits in common
B. are born with diverse cultures
C. are born without a fixed nature
D. change their characters as they grow up