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108次のパッセージを3 分間でメモを取りながら読んでください。前ページの表のように、左側にReading で述べられている3 ポイント、右側にListening で述べられる反論を書き込めるようにメモを取るとよいでしょう。I....

108次のパッセージを3 分間でメモを取りながら読んでください。前ページの表のように、左側にReading で述べられている3 ポイント、右側にListening で述べられる反論を書き込めるようにメモを取るとよいでしょう。Integrated Task 練習問題Reading Time: 3 minutesOf all the sharks that swim in the oceans, none has such a distinct profile as thehammerhead shark. The hammer-shaped elongated head for which it is namedmakes it instantly recognizable, and it has invited speculation for centuries.Obviously, such a radical alteration in shape must be an adaptation, but for whatpurpose? Many theories have been proposed, and those which have garneredthe most support include acting as a bludgeoning weapon, providing increasedmaneuverability, and improving sensory reception.Due to the shape of their heads and their relatively small mouths, some haveproposed that the hammer-shaped head is used as a weapon. Hammerheadstypically hunt near the sea floor, and they could use their head to strike prey,slamming it into the ground. Indeed, some hammerheads have been observedholding their prey down while they devour it. A more normally shaped head wouldmake this tactic difficult if not impossible to carry out.The wide, flat shape of the head may serve another physical purpose?acting asa kind of hydrofoil. Other species of shark are dedicated to moving in more orless a straight line once they begin a strike. However, hammerheads have beenobserved rapidly changing direction, and their head could be the reason. Muchlike the wings of an airplane, the head shape could provide lift in the water. Thisadditional energy could easily be channeled into making sharper turns whilepursuing prey.The hammer shape may also serve the purpose of increasing their sensory ability.Like most species of shark, hammerheads have electro-sensory organs locatedon the underside of their snouts. These sensitive organs allow them to detect thefaint electrical signals that all animals emit, allowing the sharks to track their preymore easily. The increased number of sensory organs would compensate for thelimited field of vision their eye placement would cause.Writing Question 1 VOLUME HELP NEXT