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
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
单项选择题
Bertrand Russell's notion about electricity is ______.
A．disapproved of by most modern scientists
B．in agreement with Aristotle's theory of self-evident principles
C．in agreement with scientific investigation directed toward "how" things happen
D．in agreement with scientific investigation directed toward "why" things happen
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