单项选择题

The case of Enron bankruptcy

A．triggers grand-scale economic recession in America.
B．affects the Swissair and Sabena in Europe.
C．marks the most dramatic economic situation in America.
D．gets more companies into trouble around the world.

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单项选择题

It is implied in the text that

A．some animals may also have the same ability to use language as human beings.
B．human beings, unlike many other animals, no longer have such features as great strenght, claws, long teeth and other defenses.
C．there seems to be nearly no difference between human beings and other animals.
D．monkeys and chimps seem to have more in common with human beings than any other animals.

单项选择题

The text mainly tells us about

A．the history of animal learning.
B．the difference between animals' culture and that of human beings.
C．the various aspects of animals' culture.
D．the divding line between animals and human beings.