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PTE阅读练习训练(二)

2017-07-14 15:17 作者:admin
摘要:100留学​总结的阅读练习题,PTE阅读薄弱的同学赶紧收藏啦

下文是100留学总结的阅读训练题,PTE阅读薄弱的同学赶紧收藏啦!什么?你在PTE其他科目也遇到瓶颈了?赶紧添加高分助教jason(微信ptelixiang)获取更多帮助吧~

I'm Christopher Intagliata. The way we sample much of the world's oceans, to see what's living down there, is pretty basic: Ask fishermen.Or just stick a net down there, and examine what we catch. Neither method is ideal. Because you basically catch the fish and kill them.Philip Francis Thomsen, a biologist at the Natural History Museum of Denmark. Another drawback, he says, is you can't do it everywhere.If the bottom is too soft, or too rocky, or there's a coral reef, you don't want to use this invasive method above sensitive habitat.So Thomsen and his team investigated an alternative, that's been used in freshwater with some success: they sampled the diversity and abundance of marine life using something called environmental DNA, or eDNA.

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