A、a complex system which processes the food so that it can be used for energy
B、the process which begins in the mouth, where food is chopped and crushed by the teeth
C、digestive organs where nutrients are absorbed into the blood through the villi
D、the muscular walls of the stomach
第1题
A.colleagues
B.neighbors
C.parents
D.students
第2题
A、the marketplace guiding the self-interests of market participants into promoting general economic well-being.
B、the fact that social planners sometimes have to intervene, even in perfectly competitive markets, to make those markets more efficient.
C、the equality that results from market forces allocating the goods produced in the market.
D、the automatic maximization of consumer surplus in free markets.
第3题
第4题
A.Emergency power
B.Reserve source of energy
C.Ship’s emergency diesel generator
D.Ship’s standby generator
第5题
A、against a second prosecution after an acquittal or conviction
B、against being forced to receive multiple punishments for the same offense
C、against a re-prosecution after a mistrial
D、all of the above
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