单项选择题

The best title of the passage is ______.

A．The Methods of Science
B．The Air Pressure Hypothesis
C．How to Make Deductions
D．How to Form a Hypothesis
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单项选择题
According to the passage, French production ______.
A．was inadequate to meet the needs of the French people
B．was flooding the international market with inferior products
C．emphasized industrial production at the expense of agricultural production
D．was enough for the local market
单项选择题
According to the passage, which of the following is not true
A．Galileo did not solve the problem of the water-pump.
B．When a scientist tries to establish a scientific law, he must collect much information.
C．An original hypothesis is not always accepted.
D．Using a good vacuum pump, it is possible to raise water from the bottom of a building to the roof 50 feet above.
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