OG1 阅读 Q47

Choice B is the best answer. The author of Passage 2 recognizes that space mining may prove beneficial to humanity, stating that "we all stand to gain: the mineral bounty and spin-off technologies could enrich us all" (lines 50-52,"billionaires even ...enrich us all."). The author also repeatedly mentions that space mining should be carefully considered before it is implemented: "But before the miners start firing up their rockets, we should pause for thought" (lines 53-5, But before the...pause for thought.); "But [space mining's] consequences—both here on Earth and in space—merit careful consideration" (lines 57-59,But its consequences......consideration.).
Choice A is incorrect because the author of Passage 2 concedes that "space mining seems to sidestep most environmental concerns" (lines 55-56,"space......concerns") but does not imply that space mining will recklessly harm the environment, either on Earth or in space. Choice C is incorrect because the author of Passage 2 does not address any key resources that may be disappearing on Earth. Choice D is incorrect because the author of Passage 2 admits that "resources that are valuable in orbit and beyond may be very different to those we prize on Earth" (lines 74-76,"The resources that...Earth") but does not mention any disagreement about the commercial viabilities of space mining discoveries.