关于鲨鱼的句子
海洋中的鲨鱼就像陆地上的猛虎、人间的强盗一样,专www.souquanme.com门以吞食弱者为生。
鲨鱼十分凶猛,能一下子吞掉几十条小鱼,吃起小鱼来,犹如风卷残云一般。
鲨鱼十分凶猛,能一下子吞掉几十条小鱼,吃起小鱼来,犹如风卷残云一般。
描写鲨鱼的句子
字典给的:
Shark:Any of numerous chiefly marine carnivorou搜趣网s fishes of the class Chondrichthyes (subclass Elasmobranchii), which are sometimes large and voracious and have a streamlined, torpedolike body, five to seven gill openings on each side of the head, a large oil-filled liver, a cartilaginous skeleton, and tough skin covered with small toothlike scales.
鲨鱼:任一种软骨鱼纲的海生食肉鱼,有的qavbOyD体形巨大、贪婪并呈流线形,有鱼雷状躯体,头的侧面各有五至七个鳃孔,并生有一个大的富有油脂的肝脏,一个软骨骨架和覆盖有小齿状鳞片的坚韧表皮
Shark:Any of numerous chiefly marine carnivorou搜趣网s fishes of the class Chondrichthyes (subclass Elasmobranchii), which are sometimes large and voracious and have a streamlined, torpedolike body, five to seven gill openings on each side of the head, a large oil-filled liver, a cartilaginous skeleton, and tough skin covered with small toothlike scales.
鲨鱼:任一种软骨鱼纲的海生食肉鱼,有的qavbOyD体形巨大、贪婪并呈流线形,有鱼雷状躯体,头的侧面各有五至七个鳃孔,并生有一个大的富有油脂的肝脏,一个软骨骨架和覆盖有小齿状鳞片的坚韧表皮
鲨鱼的外形特征?
鲨鱼的主要食物是海豹、乌贼、企鹅、浮游动物、浮游植物等,鲨鱼属于脊椎动物门软骨纲(Chondrichthyes)板鳃亚纲,海生,少数种类进入淡水,为一群游速快的中大型海洋鱼类。鲨内骨骼完全由软骨组成,常钙化。鲨鱼区别其他鱼主要是鳃裂,每侧5~7个,其他鱼是鳃盖。
外表特征:体呈长纺锤形。鳃裂侧位,胸鳍正常,不与吻的前缘愈合;背鳍背位;歪尾型。身体呈//www.souquanme.com纺锤状,头两侧有腮裂,但位置类似普通鱼。除个别例外,典型的鲨鱼皮肤坚硬,呈暗灰色,牙齿状鳞片使皮肤显得粗糙。尾部强壮有力,不对称、上翘;鳍呈尖状;吻尖,www.souquanme.com前突,吻下有新月形嘴及三角形尖牙。