更多"What is the main purpose of this pa"的相关试题:
[单项选择]What is the main purpose of this passage
A. To describe an experiment in which a Hydrapulper is used.
B. To introduce Hydrapulper, a new type of garbage disposer.
C. To tell what the writer thinks of the recycling of garbage.
D. To explain why garbage should be recycled in a new way.
[单项选择]What is the main purpose of the passage
A. To outline contrasting types of economic systems.
B. To explain the science of economics.
C. To argue for the superiority of one economic system.
D. To compare barter and money-exchange markets.