19.In a little-known part of the counter-terrorism (反恐怖主義) world,one of the most effective detection systems is a 600-pound animal that works for about 20pounds of fish a day.
Since the 1960s,the United States and a handful of other countries have trained dolphins and sea lions to detect sea mines and swimmers,and to recover worn--out torpedoes (魚雷) and testing objects used in naval (海軍的) exercises.
The U.S.Navy kept its Marine Mammal Program a secret until the 1990s,and this spring CNN became one of the first members of the media to witness firsthand how the program works.
The program trains about 75Pacific bottlenose dolphins,with natural biosonar (生物聲納) that tracks better than any manmade device; and 35California sea lions,with very good underwater eyesight.
Not only do these trained marine mammals track and save millions of dollars in U.S.military equipment,they are also helping to save lives.The Navy won't reveal whether the dolphins and sea lions have effectively stopped terrorists attempting to do harm to the U.S.
A key part of the training program is teaching these mammals how to stop potentially unfriendly swimmers.The program is also positioned to defend against swimmer terrorist attacks as well.
In the digital age,it seems that there should be more advanced approaches to guard the Navy's most expensive things.But according to Rothe,the program director,nothing in today's high-technology world can compete with these mammals'biosonar abilities."I hope that one day there is a robot or a UUV (un-manned underwater vehicle) that makes the mammal program out of date,"he said."But right now this is the best thing out there."
25.The U.S.Marine Mammal Program trained marine mammals toA.
A.stop dangerous swimmers
B.catch 20pounds of fish a day
C.destroy sea mines
D.fire torpedoes
26.What can we learn from the last paragraph?A
A.The trained dolphins are the best way of protection available to the U.S.Navy.
B.There will be dolphin-like robots in the future according to Rothe.
C.The mammal program will become useless soon.
D.Rothe has no faith in today's high technology.
27.Which of the following is TRUE according to the text?D
A.Many countries have trained sea animals for counter-terrorism.
B.The Marine Mammal Program was a secret until the 1960s.
C.The trained sea animals have already stopped some terrorists.
D.The U.S.Navy has trained both dolphins and sea lions.
分析 可愛乖巧的海豚和海獅充當高效反恐先鋒,成為美國反恐大軍中的佼佼者.它們不僅可為美國海軍減少巨額損失,同時還能幫助救贖生命.
解答 25.A 26.A 27.D
25.A 細節(jié)理解題.根據(jù)文章第二段及第六段中的teaching these mammals how to stop potentially unfriendly swimmers可以訓練這些動物是為了阻止那些危險的游泳者,故A項正確.
26.A 推理判斷題.根據(jù)最后一段…nothing in today's high-technology world can compete with these mammals'biosonar abilities可知,在某種意義上講,海豚是保護美國海軍最好的方法,故答案為A
27.D 細節(jié)理解題 根據(jù)第三段The program trains about 75Pacific bottlenose dolphins,with natural biosonar (生物聲納) that tracks better than any manmade device; and 35California sea lions,with very good underwater eyesight.可知,這項項目不光訓練海豚,還訓練了海獅,可知D項是正確的,故答案為D
點評 閱讀理解題測試考生在閱讀基礎上的邏輯推理能力,要求考生根據(jù)文章所述事件的邏輯關系,對未說明的趨勢或結局作出合理的推斷;或根據(jù)作者所闡述的觀點理論,對文章未涉及的現(xiàn)象、事例給以解釋.考生首先要仔細閱讀短文,完整了解信息,準確把握作者觀點.