单项选择题

The aim of controlled scientific experiments is ______.

A．to explain why things happen
B．to explain how things happen
C．to describe self-evident principles
D．to support Aristotelian science
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单项选择题
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.
单项选择题
Which of the following is the topic most likely to be discussed right after the passage
A．Tile most recent definition of "explain".
B．The relationship between science and religion.
C．The limitations of science.
D．Galileo and the birth of modem scienc
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