单项选择题

23()

A．which
B．that
C．one
D．all

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单项选择题

Which of the following statements is NOT mentioned in the passage（）

A．The climate is associated with man’s intelligence.
B．People’s creative thinking is changing from season to season.
C．That temperature affects one’s creative thinking has been scientifically proved.
D．Autumn is the second best season for thinkin

单项选择题

It can be learned from the passage that about four billion years ago （）.

A．the earth was in molten state
B．the earth surface temperature was above 100℃
C．the earth surface temperature was below 100℃
D．rain water could remain on the earth