论文部分内容阅读
一般的鲤鱼只有两个鼻孔,但是位于江苏、山东交界处的微山湖里的鲤鱼,却长着四个鼻孔和四根触须.原来该湖地处黄河故道,湖畔多是泥沙地带.每年汛期都有大量的泥沙被雨水冲入湖里.这种状况给习惯于在深水处活动的鲤鱼造成
The common carp has only two nostrils, but the common carp in Weishan Lake at the junction of Jiangsu and Shandong has four nostrils and four tentacles, which originally belonged to the old course of the Yellow River and lakeside sediments. Floods have a lot of sediment was rushed into the lake water.This situation is accustomed to the activities of the carp caused by deep water