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  3. It has been 50 years since the Trieste submersible made the only descent of humans into the deepest place in the ocean, the Mari

It has been 50 years since the Trieste submersible made the only descent of humans into the deepest place in the ocean, the Mari

admin2014-04-20  13
问题     It has been 50 years since the Trieste submersible made the only descent of humans into the deepest place in the ocean, the Mariana Trench. In the coming decades, we need to look again into the depths of our own piece of the solar system. We’ve explored only about 5 percent of the ocean. It’s maddening that we know so little about what the seafloor looked like at the site of the Deepwater Horizon spill before the oil began to leak. It’s only a mile underwater! For us to have better maps of the moon, Mars, and Jupiter than our own ocean floor is baffling.
    The natural world, especially the ocean, keeps us alive. More than half of all of the oxygen in our atmosphere is generated by organisms in the sea. We need to understand the systems that sustain us. Underwater monitoring and remote-operated vehicles such as the Nereus are improving, but those alone are not enough. The human brain and senses, the ability to wonder and to confront the unexpected—you can’t get that out of a machine.
    Japan, Russia, and France(but not the United States)have deep-diving submersibles that can carry humans down to 5,000 meters and beyond. There is currently no manned sub with the capacity to go to full ocean depth, 11,000 meters. The technology already exists; We could build a pair of three-person deep-diving subs for less than $ 50 million. James Cameron is well on the way to having a one-person sub for that depth.
    Therefore, we need to pull up our socks and realize that we still have a chance to prevent the loss of all sharks, coral reefs, and rain forests and to stabilize our atmosphere and the acidification of our oceans. Living in undersea laboratories nine times, I’ve had the opportunity to get to know individual fish and their quirky habits. I’ve met humpback whales, sea turtles, giant groupers, and an egg-bearing octopus I encountered in a one-person sub—creatures who had never seen a human before.
    Many animals are struggling through this time of perilous change. But we alone can understand what is happening and what to do about it. Seeing the sharp declines in parts of the ocean I have come to know and love reminds me that as we look into new ways to protect our planet from climate change, we need to look again at the natural machinery that already works, that developed over four and a half billion years, and do everything we can to restore its functions. It is the engine that will power us to the future.
It is implied in the last two paragraphs that______.
选项 A、the acidification is an indicator of the declines of the ocean
B、humans should harmonize their activity with the laws of nature
C、climate change has endangered many marine creatures
D、most energy for future development can be obtained from the sea
答案B
解析 推断题。本题解答主要依据最后一段的最后两句话。作者指出在防止气候变化的同时，我们需要重新审视自然机制，并恢复它的功能，毕竟，自然机制才是人类未来的发动机。可见，作者呼吁人们尊重自然。[B]与原文相符，故为答案。[A]项曲解了前文提到的酸度与海洋环境的关系，作者提出应该稳定大洋的酸度，但不能说酸度是海洋环境恶化的表现，故可排除。考生容易主观依赖自己的背景知识误选[C]，而气候变化是否令海洋生物处境危险，作者在文中并没有给出明确的暗示，因此[C]也错误。[D]是对最后一句话的曲解，作者的原意是自然规律和机制是我们未来发展必须尊重的，并没有提到能量从何处来，故[D]也．应排除。
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