Disserve and control measures of main defoliating insect of eucalypt in china 我国桉树主要食叶害虫的危害及防治
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Because of the disserve and its breaking out suddenly , the government ’ s cost of taking measures to control the bubbles is very great 由于房地产泡沫具有爆发突然、危害大的特点,一旦泡沫形成,政府再采取补救措施,必定会付出巨大代价。
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