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Humpback Whales Humpback whales are some...

Humpback Whales

Humpback whales are sometimes calledperformers of the ocean.This is because they can make impressive movements whenthey dive.The name“humpback”, which isthe common name for this whale, refers to the typical curve shape the whale'sback forms as it dives.

Sometimes the humpback will dive with a fantasticmovement known as a breach.During breaching the whale uses its powerful tailflukes to lift nearly two-thirds of its body out of the water in a giant leap.A breach might also include a sideways twist with fins stretched out likewings, as the whale reaches the height of the breach.

A humpback whale breathes air at the surface of thewater through two blowholes which are located near the top of the head.It blowsa double stream of water that can rise up to 4 metres above the water.

The humpback has a small dorsal fin located towardsthe tail flukes about two-thirds of the way down its back.Other distinguishingfeatures include large pectoral fins, which may be up to a third of the bodylength, and unique black and white spots on the underside of the tailflukes.These markings are like finger prints: no two are the same.

Humpback whales live in large groups.They communicatewith each other through complex “songs”.

Quick Facts

Size:

14m-18m in length;

30-50 tons in weight

Living

Open ocean and shallow coastline waters

Environment

From warm tropical waters, where they breed, to  cold polar waters,

where they eat

Diet:

Shellfish, plants and fish of small size

Hunting:

Sometimes in groups, in which several whales form a  circle under the water, blowing bubbles that form a “net” around a school of  fish.The fish are then forced up to the surface in a concentrated mass.

Current state:

Endangered: it is estimated that there are about  5000-7500 humpback whales worldwide

 

 

1.According to Quick Facts, ahumpback whale _____.

A. cannot survive in waters near the shore

B. doesn't live in the same waters all the time

C. lives mainly on underwater plants

D. prefers to work alone when hunting food

2.To make a breach, a humpback whale must _____.

A. use its tail flukes to leap out of the water

B. twist its body sideways to jump high

C. blow two streams of water

D. communicate with a group of humpbacks

3.From the passage we can learn that a humpback whale _____.

A. has its unique markings on its tail flukes

B. has black and white fingerprints

C. gets its name from the way it hunts

D. is a great performer due to its songs

 

1.B 2.A 3.A 【解析】 本文是一篇说明文。Humpback whales有时被称为海洋的表演者。文章介绍了它的生活习性。 1.推理判断题。根据Quick Facts中Living:Open ocean and shallow coastline waters可知,根据Quick Facts,,humpback whale并不是一直生活在同一水域。故选B。 2.细节理解题。根据第二段中During breaching the whale uses its powerful tailflukes to lift nearly two-thirds of its body out of the water in a giant leap.可知,为了打破这一缺口, humpback whales必须用它的尾鳍跃出水面。故选A。 3.推理判断题。根据第四段中unique black and white spots on the underside of the tailflukes可知从这篇文章中我们可以了解到humpback whales在它的尾巴上有它独特的标记。故选A。
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