托福閱讀tpo2theoriginsofcetaceans鯨類起源原題解析(編輯修改稿)
2025-04-22 00:30 本頁面
【文章內(nèi)容簡介】 行。雖然 Ambulocetus natans保留了尾巴，但它們?nèi)鄙佻F(xiàn)代水生鯨類動物用于行動的主要身體部位——尾片。不過，從Ambulocetus的脊椎結(jié)構(gòu)上可以看出，即使缺少尾 片，它們也能像現(xiàn)代鯨魚那樣通過身體背部的上下擺動來游走。大的后肢通常被當(dāng)作是水中前行的發(fā)動機(jī)。在它們可能交配繁殖的陸地上，Ambulocetus 行動起來非常像現(xiàn)代海獅。毫無疑問，鯨魚是連接著陸地生命和海洋生命的物種。第1題：In paragraph 1, what does the author say about the presence of a blowhole in cetaceans?A：It clearly indicates that cetaceans are mammals.B：It cannot conceal the fact that cetaceans are mammals.C：It is the main difference between cetaceans and landdwelling mammals.D：It cannot yield clues about the origins of cetaceans.解析：根據(jù)blowhole 查找原文，找到：the presence of a fluke1 and blowhole2 cannot disguise their affinities with land dwelling ，是對該句的同義改寫。A錯誤，反了。C錯誤，沒有提到。D錯誤，沒有提到。第2題：Which of the following can be inferred from paragraph 1 about early sea otters?A：It is not difficult to imagine what they looked likeB：There were great numbers of them.C：They lived in the sea only.D：They did not leave many fossil remains解析：典型取非推理題。根據(jù)sea otters定位原文，找到：unlike the cases of sea otters and pinnipeds (seals, sea lions, and walruses, whose limbs are functional both on land and at sea), it is not easy to envision what the first whales looked like。A正確。BCD都不能推出。第3題：The word precious in the passage is closest in meaning toA：ExactB：ScarceC：ValuableD：Initial解析：This is a Vocabulary question. The word being tested is precious. It is highlighted in the passage. The correctanswer is choice 3, valuable. Anything that is precious is very important and therefore valuable. 第4題：Pakicetus and modern cetaceans have similarA：Hearing structuresB：Adaptations for divingC：Skull shapesD：Breeding locations解析：根據(jù)P定位2段、3段，3段提到：The skull is cetaceanlike，所以C正確。A反。B沒有提到。D反。第5題：The word it in the passage refers toA：PakicetusB：FishC：LifeD：ocean解析：指代題，根據(jù)前句，It has been suggested that Pakicetus fed on fish in shallow water and was not yet adapted for life in the open ocean。說的就是P，所以選A 第6題：The word exposed in the passage is closest in meaning toA：ExplainedB：VisibleC：IdentifiedD：Located解析：This is a Vocabulary question. The word being tested is exposed. It is highlighted in the passage. The correctanswer is choice 2, visible. Exposed means uncovered. A skeleton that is uncovered can be seen. Visiblemeans can be seen. 第7題：The hind leg of Basilosaurus was a significant find because it showed that BasilosaurusA：Lived later than
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