鼠类的活动对人类的危害极大。它不仅能够毁坏物品和破坏生产,而且能够传染疾病给人,侵害人体的健康。大连是我国北方的一个大港,对外贸易通往世界各地,远洋航线遍及世界五大洲。五十年代初期,大连港是旧中国留下的一个破烂摊,千疮百孔,港区卫生非常不好,鼠患比较严重,当时的鼠密高达14.5%,曾有一批出口物资,一次就被老鼠咬坏了二千七百多包,不仅在经济上受到损失,而且在政治上也造成了不良影响。为此,在一九五 Rodent’s activities are extremely harmful to humans. It can not only destroy goods and destroy production, but also can infect people and infect human health. Dalian is a big port in the northern part of our country. Its foreign trade leads to all parts of the world. Ocean-going routes span five continents of the world. In the early 1950s, Dalian Port was a dilapidated building left by the old China. There were so many holes in it. The hygiene in the port area was very poor. The rat population was relatively serious. At that time, the rat density was as high as 14.5%. There was a batch of export goods once supplied The bite of more than 2,700 bales by rats has not only suffered economic losses, but has also had an adverse political impact. For this reason, in 195