【Native Speaker每日综合训练—27系列】【27-10】科技

lxskyfly

以为还有首页末班！T_T......谢谢ppx！
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SPEED
1. background: Forbidden City owns so many heavy rocks for safer protection.
    question: why these heavy rocks can be moved here by ancient people?
    traditional idea--> new idea: rocks-hauling on ice road;
    criticism from foreign sicentists abt the new idea.
2. response to those 2 questions:
1) not other vehicles could carry rock that heavy;
2) analysis: with lubiracated film of water, it's plausible, but it seems to underestimated amount of people needed.
3. paper: injection of CO2 in oil production place huge dangers in Texas, causing more tremors.+ other proved info
    two opinions aganist the paper:
1) not other reasonable info(other places etc) to prove that conclusion
2) injection of CO2 indeed cause some tremors but not that dangerous as the paper depicts.
4. Scientists found that evolutin in genmones of animals slows out at first but then boost the steps in differences.