2011年GMAT考试阅读材料3(附答案)(2)

　　(B) Spreading of ocean trenches

　　(C) Movement of mid-ocean ridges

　　(D) Sinking of ocean basins

　　(E) Differences in temperature under oceans and continents

　　2. It can be inferred from the passage that, of the following, the deepest sediments would be found in the

　　(A) Indian Ocean

　　(B) Black Sea

　　(C) Mid-Atlantic

　　(D) South Atlantic

　　(E) Pacific

　　3. The author refers to a “conveyor belt” in line 13 in order to

　　(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

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