单项选择题

What is the best title for the passage

A．Virgin Materials and Secondary Materials
B．What is Recycling
C．Solid Waste Management
D．Problems of Recycling
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单项选择题
What does the author's attitude toward recycling solid waste
A．Opposed.
B．Detached.
C．Approved.
D．Optimistic.
单项选择题
What can be inferred from the passage concerning resource recovery
A．The solid wastes can be cheaply recycled.
B．Resource recovery has become a significant vein of resource.
C．Governmental intervention is very important to solve the problems of recycling.
D．Solid waste management only involves collection and disposal.
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