Fish
Birds
100
The remora’s oval-shaped suction disc is located on the ________ of its head. (left, right, back)
䲟鱼的________长有一个椭圆形的吸盘，吸盘外圈有个环。(头顶上, 头部右边，头部左边）
back， 头顶上
100
Gannets are large seabirds that plunge toward the ocean’s surface at speeds of up to _____ kilometers per hour (180, 190, 200)
塘鹅是大型的海鸟，它们会俯冲进海里觅食，时速可高达_____公里。(180, 190, 200)
190
200
Dolphins produce a variety of clicks and whistles and then listen for __________ in order to navigate and explore their environment. (sounds, echoes, cries)
海豚会发出不同的滴答声和口哨声，然后用_____来定位或探测周围的环境。(声音，回声，哭声）
echoes，回声
200
The Japanese bullet train is one of the fastest in the world. In part, it owes its success to the ________. (sharks, leopards, kingfisher)
日本的新干线列车（俗称子弹列车）是世上的高速列车之一，时速接近300公里。从某程度上来说，要归功于________. (鲨鱼，猎豹，翠鸟）
kingfisher， 翠鸟
300
The shark's skin makes it very difficult for _________ to latch on. (fish, microorganisms, lobsters)
鲨鱼的皮是 _________ 很难附着在鲨鱼皮上。（鱼类，微生物，龙虾）
microorganisms， 微生物
400
The humpback whale has uniquely large bumps called _________ on the leading edge of its flippers.
座头鲸鳍肢的前缘上却有一些很特别的凸块，叫做________。
tubercles, 结节
500
The long-finned pilot whale's skin is covered with tiny ridges, which are too small to allow ________ to get a good grip. (barnacle larvae, bacteria, parasites)
长肢领航鲸（又名巨头鲸）的皮肤布满微小且细长的突起，这些突起非常小，造成_______ 难以附着。(藤壶幼虫, 微生物，寄生虫）
barnacle larvae， 藤壶幼虫
