【正文】 ow the picture of a killer whale and do a small quiz about it. (1)What39。Anecdotes Time action： Threw_itself out_of the water and then crashed_down again. Swam_by the boat， showing the whalers the way. Circled back to the boat, leading the whalers to the hunt. The whalers39。 boat and the whale， just like a pack of excited dogs. Within a moment or two， the whale39。s own eyes many times， sort out my acmodation， in time to do sth.， crash down， yell out， ahead of， flee out to sea， aim at， let ， be dragged swiftly down into the depths of the sea， in the meantime， have a good feed on sth.， be carried further and further away， be firmly held up in the water 3． Reading， identifying and settling. Students skim the text once again and identify the difficult them try analyzing the structures of the difficult sentences and discuss them among their group may also turn to the teacher for help. Being badly wounded， the whale soon died. t let the shark are so clever and friendly to human 39。s blow－ hole to stop it those others stopped it fleeing out to last， we succeeded in catching the meantime， we enjoyed the lips and tongue of the baleen whale， leaving the rest of it to the whalers the next day. One day， James was washed off the sea was waves were carrying him further and further still， I saw a shark swimming James39。s blow－ hole to stop it those others stopped it fleeing out to last， we succeeded in catching the meantime， the killers enjoyed the lips and tongue of the baleen whale， leaving the rest of it to us the next day. Another day， I was washed off the sea was waves were carrying me further and further make matters worse， I saw a shark swimming was terrified of being abandoned by others and attacked by the to my surprise， Old Tom wouldn39。 popularity， there are concerns that intensive whale watching operations may drive whales from their preferred well， noise－ making devices attached to salmon cages to scare off predators may also force whales out of their preferred habitat， affecting their ability to orca populations are also hunted in Japan，Indonesia， Greenland and the West Indies. 外形特征 虎鯨是一種大型齒鯨，身長(zhǎng)為 8～ 10 米，體重 9 噸左右，背呈黑色，腹為灰白色，有一個(gè)尖尖的背鰭，背鰭彎曲長(zhǎng)達(dá) 1 米，嘴巴細(xì)長(zhǎng)，牙齒鋒利，性情兇猛，食肉動(dòng)物，善于進(jìn)攻獵物，是企鵝、海豹等動(dòng)物的天敵。大而高聳的背鰭位于背部中央，其形狀有高度變異 性，雌鯨與未成年虎鯨的背鰭呈鐮刀形，而成年雄鯨則多半如棘刺般直立，高度約 1 至 米。 虎鯨的體色圖樣主要由黑與白這兩種對(duì)比分明的色彩組成，位于身體腹面的白色區(qū)域自下顎往后延伸至肛門處，在全黑的胸鰭之間變得狹窄，到了肚臍后方產(chǎn)生分歧，尾鰭腹面亦為白色?；ⅥL的泳速最快可達(dá)時(shí)速 55千米，可閉氣 17 分鐘左右。在北極與南極海域，因?yàn)轱L(fēng)吹而快速產(chǎn)生的浮冰對(duì)虎鯨而言是一大麻煩，有時(shí)會(huì)因此迫使它們停留于水面開闊的小水域里相當(dāng)長(zhǎng)的時(shí)間。 它們?cè)谝黄鹇眯校檬?，以種群為社會(huì)組織，在廣大的家庭中休息，互相依靠著生存長(zhǎng)大。各群似乎有 自己偏好的食物種類，例如某些族群主要以鮭魚、鮪魚、或鯡魚等魚類為主要食物，某些群則會(huì)巡視鰭腳類的登陸地尋找獵物，或跟隨遷徙中的鯨群，有如狼群追蹤北美馴鹿的情景。其獵物可能深受對(duì)虎鯨的恐懼所影響，當(dāng)虎鯨出現(xiàn)時(shí)鰭腳類會(huì)逃往陸地或冰上，鯨豚則會(huì)游入淺水域或藏匿于浮冰的裂隙間?；ⅥL也會(huì)偷吃延繩釣漁船上鉤的魚獲，或吃食漁民丟棄的下雜魚等。虎鯨的食物多樣，由小型結(jié)群魚類、魷魚 (槍烏賊 )，一直到大型須鯨與抹香鯨都有可能成為它們的獵物；其他的如海豹等鰭腳類動(dòng)物、海龜、海豚、海狗、海獺、海牛、儒艮、鯊魚、魟等，甚至還有鹿與麋鹿，似乎是趁它們游泳橫渡水道時(shí)伺機(jī)捕食。群體成員間的胸鰭經(jīng)常保持接觸，顯得親熱和團(tuán)結(jié)。它們對(duì)船只的反應(yīng)多樣，冷漠忽視或是充滿好奇心都有可能。在背鰭后方有呈灰至白色的馬鞍狀斑紋。上、下顎各有 10 至 14 對(duì)大而尖銳的牙齒作為武器，每顆牙大概有 8 厘米。 壽命：雄性： 50～ 60 年；雌性： 80～ 90 年，甚至 100 年 雌雄虎鯨外觀區(qū)別 (上雄下雌 ) 虎鯨的體型極為粗壯，是海豚科中體型最大的物種。s killer whale population seems to consist of subpopulations adapted to live within the specialized niche of their pod39。t let the shark they approached him， I had been holding him up in the water for half an hour. I do hope you could witness them with your most importantly， you should learn from us—“work as a team”！ In the name of the baleen whale I was a pitiful baleen whale. I once lived in the southeastern ocean of Australia. At the beginning of the 20th century， a misfortune did fall upon my great sorrow， I was cornered and killed by the whalers with the help of another kind of whale called killer whales. On that day， I was found by a killer whale called Old Tom quickly threw himself out of the water and crashed down soon as the whalers saw this and headed out to the hunt， he swam by the boat， showing them the the killers work as a team—a pack of about six of threw themselves on top of my blow－ hole to stop me those others stopped me fleeing out to last， I was worn out and had no was badly wounded by a did nothing did they want to kill me？ Later， I was dragged down into the depths of the sea， having had my lips and tongue was sent back to the whalers the next really hated the they hadn39。t like they are clever a