单项选择题

Which is NOT one of the main keys to recycling as mentioned in the passage

A．Government regulation of waste.
B．A more informed public.
C．Better technology.
D．More demand for recycled materials.
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单项选择题
By advancing the theory of （）, Bacon showed the new empirical attitutes toward truth about nature and bravely challenged the medieval scholasticists.

A.inductive reasoning
B.deductive reasoning
C.education
D.scientific experimentation
单项选择题
The author points out that the Greeks who studied conic sections______
A．invented modern mathematical applications
B．were interested in navigation
C．were unaware of the value of their studies
D．worked with electricity
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