¡¡¡¡£¨A£© illustrate the effects of convection in the mantle
¡¡¡¡£¨B£© show how temperature differences depend on the positions of the continents
¡¡¡¡£¨C£© demonstrate the linear nature of the Mid-Atlantic Ridge
¡¡¡¡£¨D£© describe the complicated motions made possible by back-coupling
¡¡¡¡£¨E£© account for the rising currents under certain mid-ocean ridges
¡¡¡¡4. The author regards the traditional view of the origin of the oceans with
¡¡¡¡£¨A£© slight apprehension
¡¡¡¡£¨B£© absolute indifference
¡¡¡¡£¨C£© indignant anger
¡¡¡¡£¨D£© complete disbelief
¡¡¡¡£¨E£© guarded skepticism
¡¡¡¡5.According to the passage£¬ which of the following are separated by a plate that is growing on both sides£¿
¡¡¡¡£¨A£© The Pacific Ocean and the Sea of Japan
¡¡¡¡£¨B£© The South Atlantic Ridge and the North Sea Ridge
¡¡¡¡£¨C£© The Gulf of Mexico and the South Atlantic Ridge
¡¡¡¡£¨D£© The Mid-Atlantic Ridge and the Indian Ocean Ridge
¡¡¡¡£¨E£© The Black Sea and the Sea of Japan
¡¡¡¡6. Which of the following£¬ if it could be demonstrated£¬ would most support the traditional view of ocean formation£¿
¡¡¡¡£¨A£© Convection usually occurs along lines.
¡¡¡¡£¨B£© The upper mantle behaves as a dense solid.
¡¡¡¡£¨C£© Sedimentation occurs at a constant rate.
¡¡¡¡£¨D£© Sinking plates cool the mantle.
¡¡¡¡£¨E£© Island arcs surround enclosed seas.
¡¡¡¡7. According to the passage£¬ the floor of the Black Sea can best be compared to a
¡¡¡¡£¨A£© rapidly moving conveyer belt
¡¡¡¡£¨B£© slowly settling foundation
¡¡¡¡£¨C£© rapidly expanding balloon
¡¡¡¡£¨D£© violently erupting volcano
¡¡¡¡£¨E£© slowly eroding mountain
¡¡¡¡8. Which of the following titles would best describe the content of the passage£¿
¡¡¡¡£¨A£© A Description of the Oceans of the World
¡¡¡¡£¨B£© Several Theories of Ocean Basin Formation
¡¡¡¡£¨C£© The Traditional View of the Oceans
¡¡¡¡£¨D£© Convection and Ocean Currents
¡¡¡¡£¨E£© Temperature Differences Among the Oceans of the World
¡¡¡¡´ð°¸£º
¡¡¡¡Passage 1£º BECAC BEC
¡¡¡¡Passage 2£º EBAED ABB
