由于公安机关的权力是在法定职责限度内行使的，并受相应的制约，故又称为公安机关的权限。()
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Immigration brings economic benefits in that
A. it narrows the gap between earnings in the poor and the rich worlds.
B. it helps remove trade barriers between the developing and the developed.
C. it supplies adequate labors to a slow-moving host economy.
D. it increases tax-paying in the host countries without spending public money.
It can be inferred that voters in rich countries fail to realize
A. legal immigrants took away many of their jobs.
B. immigration can be good to their countries.
C. immigration brings about the risk of AIDS.
D. immigrants made use of their health service.
According to the text, a good media CEO needs the following capabilities EXCEPT
A. being skilled at business.
B. having the ability to adjust before trends change.
C. being expert in developing talent and thoughts.
D. having the ability to manage and create.
The biggest problem media executives are facing nowadays is
A. the desire to combine.
B. competition among cable TV.
C. the collapse of media industry.
D. the interference from Internet.
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