| Question 1: The seabed (also known as the seafloor, sea floor, or ocean floor) is the bottom of the ________. | |||
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| Question 2: At the bottom of the continental slope is the continental rise, which is caused by ________ cascading down the continental slope. | |||
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| Question 3: The seabed has been explored by submersibles such as Alvin and, to some extent, ________ with special apparatuses. | |||
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