Each of the country’s 26 sates and most of its more than 2,000

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Each of the country’s 26 sates and most of its more than 2,000 municipalities have their own police forces, _____ communication and making it difficult to establish a coordinated law-enforcement strategy.

A、establishing
B、impeding
C、hampering
D、launching
E、obscuring
F、preventing

答案：B,C

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