提起苍蝇,人人厌恶,众所周知,苍蝇能传播多种疾病,危害人类的健康。研究表明:一只苍蝇携带的细菌数量可达1.7×102个,苍蝇不仅能在人群中传播30多种疾病,也会对农业和畜牧业带来危害,给人类带来经济损失。但苍蝇也不是一无是处,随着生物工程技术的飞速发展,人们对苍蝇的认识更? Lifting flies is disgusting to everyone. As we all know, flies can spread diseases and endanger human health. Studies have shown that the number of bacteria carried by a fly can reach 1.7 × 102, and flies can not only spread more than 30 diseases in the population, but also cause harm to agriculture and animal husbandry, and bring economic losses to humans. But flies are not useless. With the rapid development of bioengineering technology, people’s understanding of flies is even better.