Humpback whales are sometimes called performers of the ocean.This is because they can make impressive movements when they dive.The name"humpback",which is the common name for this whale,refers to the typical curve shape the whale's back forms as it dives. Sometimes the humpback will dive with a fantastic movement,known as a breach.During breaching the whale uses its powerful tail flukes 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 like wings,as the whale reaches the height of the breach. A humpback whale breathes air at the surface of the water through two blowholes which are located near the top of the head.It blows a double stream of water that can rise up to 4meters above the water. The humpback has a small dorsal fin located towards the tail flukes about two-thirds of the way down its back.Other distinguishing features include large pectoral fins,which may be up to a third of the body length,and unique black and white spots on the underside of the tail flukes.These markings are like fingerprints:no two are the same. Humpback whales live in large groups.They communicate with each other through complex"songs". | Quick Facts | |
Size: | 14m~18m in length 30~50tons in weight | |
Living | Open ocean and shallow coastline waters | |
Environment: | From warm tropical (熱帶的) 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 5000~7000humpback whales worldwide. |
分析 本文是一篇科普文,主要講了座頭鯨名字的由來和生活習(xí)性等.
解答 69.B 細節(jié)理解題.根據(jù)文章右欄中的Environment中的內(nèi)容"From warm tropical (熱帶的) waters,where they breed,to cold polar waters,where they eat."可知,humpback whale在熱帶水域繁殖,在寒帶水域中覓食,故選B.
70.A 細節(jié)理解題.根據(jù)文章第二段中的內(nèi)容"Sometimes the humpback will dive with a fantastic movement,known as a breach.During breaching the whale uses its powerful tail flukes to lift nearly two-thirds of its body out of the water in a giant leap"可知,有時駝背鯨在潛水時會有種意想不到的動作,稱為"突破".在"突破"時,座頭鯨會用它強有力的尾巴將自己身體的三分之二在一個飛躍到水的外面,故選A.
71.A 細節(jié)理解題.根據(jù)文章第四段"The humpback has a small dorsal fin located towards the tail flukes about two-thirds of the way down its back.Other distinguishing features include large pectoral fins,which may be up to a third of the body length,and unique black and white spots on the underside of the tail flukes.These markings are like fingerprints:no two are the same."可知,座頭鯨有一個較小的背鰭,大概是背部三分之二靠近尾部的地方.它其他的特征還包括大的胸鰭,總長有全部身體的三分之一長,以及在尾鰭下方有一些特殊的黑與白的點.這些的特點有些像指紋那樣.沒有兩條的駝背鯨有同樣的標記.A項說法正確,B項錯誤;由第一段"The name"humpback",which is the common name for this whale,refers to the typical curve shape the whale's back forms as it dives"可知,起這個名字是因為當它要潛入水中時,會將背部提到一種典型的曲線形狀,C項錯誤和"Humpback whales are sometimes called performers of the ocean",駝背鯨有時稱為海洋的表演者,D項說法錯誤,故選A.
點評 解答細節(jié)理解題時,一個常用的方法就是運用定位法,即根據(jù)題干和選項中的關(guān)鍵詞從原文中找到相關(guān)的句子,與選項進行比較從而確定答案;推理判斷題既要求學(xué)生透過文章表面文字信息推測文章隱含意思,又要求學(xué)生對作者的態(tài)度、意圖及文章細節(jié)的發(fā)展作正確的推理判斷,力求從作者的角度去考慮,不要固守自己的看法或觀點.
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