单项选择题

A good title for this passage is ______.

A．The History of Physical Science
B．Karl Popper's Physical Theory
C．The Philosophy of Science
D．Einstein's Theory of Science
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When do the best play again
A．At Christmas.
B．Before the season ends.
C．On New Year's Day.
D．On the last day of the season.
单项选择题
A number of predictions can be disproved by A. observations C. experiments B. theories D. hypotheses
A．theories
B．hypotheses
C．experiments
D．A number of predictions can be disproved by
E．observations
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