单项选择题

What the author tries to suggest may best be interpreted as ______.

A．"All the wit in the world is not in one head."
B．"There are two sides to every question."
C．"It's no use crying over spilt milk."
D．"Seeing is believing."

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单项选择题

The word exposed in paragraph 4 is closest in meaning to______.

A．photographed.
B．uncovered.
C．located.
D．appeared.

单项选择题

Which of the following is NOT true of the environments in which fossils are found

A．Very different environments can favor fossilization.
B．There are few environments in which fossils are protected.
C．Environments that favor fossilization always have similar characters.
D．Environments that favor fossilization can sometimes support large populations of animals.