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Two thousand years ago, a rich and powerful country met with floods and starvation bec
A. the soil of the country became barren
B. its empire fell
C. it cut too many trees down
D. the conquered land within its empire was poor and barren
![](https://lstatic.shangxueba.com/jiandati/pc/images/jdt_panel_vip.png)
A. the soil of the country became barren
B. its empire fell
C. it cut too many trees down
D. the conquered land within its empire was poor and barren
A.It remains unknown yet.
B.Around five thousand years ago.
C.About two million years ago.
D.About three hundred thousand years ago.
What principles most influenced scientific thought for two thousand years?
A.The speculations of Thales.
B.The forces of electricity, magnetism, and gravity.
C.Aristotle's natural science.
D.Galileo's discoveries.
Nearly two thousand years have passed______ the Chinese first invented the compass.
A.when
B.before
C.since
D.after
What principles most influenced scientific thought for two thousand years?
A.The speculations of Thales.
B.The forces of electricity, magnetism, land gravity.
C.Aristotle's natural science.
D.Galileo's discoveries.
A.has begun
B.had begun
C.began
D.begins
A.when
B.before
C.since
D.after
Nearly two thousand years have passed______ the Chinese first invented the compass.
A.when
B.before
C.since
D.after
(历史资料表明)____________that this custom originated in a small town in Egypt two thousand years ago.
A.The speculations of Thales.
B.The forces of electricity, magnetism, and gravity.
C.Aristotle's natural science.
D.Galileo's discoveries.
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