单项选择题

This passage might be taken from

A．a text book
B．a science fiction
C．a popular magazine
D．a report of a manufacturer
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单项选择题
Which one is the decisive factor in Japanese competitiveness
A．Government policy.
B．Labor cost.
C．Market demand.
D．Dumping policy.
单项选择题
Great as Newton was, many of his ideas today and are being modified by the work of scientists of our time.
A．are to challenge
B．may be challenged
C．have been challenged
D．are challenging
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