영어항공무선통신사 · 2008년10월26일 · 69/70
69."Administrations shall take the necessary steps to make as great a use as possible of higher frequencies in order to ( ) the load on the high frequency aeronautical mobile bands."에서 괄호 속에 적합한 단어를 고르시오.
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lessen정답
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increase
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use
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perform