题目内容
绩效评估结果也可以作为员工培训的一种依据。( )
查看答案
搜索结果不匹配？点我反馈
更多问题
培训是实践性很强的工作，应该加强实践，所以理论学习对培训师来说作用不大。( )
囊性动脉瘤（）。
Today, deep-ocean mining is done only by the oil and gas industry. Yet the dream of mining the mineral wealth of the deep has never gone away. Now two firms hope to succeed where others have failed. Nautilus Minerals, based in Vancouver, is the more advanced of the pair. It has an exploratory licence from Papua New Guinea and has already begun drilling operations 1,600 metres below sea level off the east coast of the country. Another company, Neptune Minerals, based in London and Sydney, has completed test drilling in the deep waters near New Zealand. Nautilus’s deep-water exploration relies on a modified deep-sea remotely operated vehicle (ROV) of the kind normally used in the oil anti telecom industries. It has a manipulator hand containing drilling and cutting tools that allow the robot to retrieve samples of rock from the ocean bed. So far the drilling has only been exploratory, but the prospects look good. The presence of these rich deposits has been known about for years, says Steven Scott, a geologist at the University of Toronto. He has been researching underwater geology since the 1980s, and in the 1990s he co-discovered the deposit that Nautilus is exploring. So why has it taken so long to move towards the commercial exploitation of deep sea massive sulphide deposits Mr. Heydon (the boss of Nautilus) says it is because the ROV technology has only recently be come capable enough. He eventually hopes to use rock-cutting ROVs that will drive across the sea floor, grinding ore as they go and sending it to the surface via a tube at a rate of 400 tonnes per hour. It might also be possible to lift large deposits using compressed air. All of this can be done, Mr. Heydon believes, for about half as much as opening a new land based mine. Nautilus has spent about $12m in the past year on exploration, and Dr Scott says one test drilling found deposits 19 metres deep. Unlike manganese (锰) mines, which are like golf balls scattered across the seabed, these deep-ocean deposits occur in small areas around extinct hydrothermal vents. Such concentrated deposits ought to make underwater mining highly efficient. Even if the economies stack up. however, Nautilus and Neptune must overcome concerns over environmental damage. Dr Scott argues that underwater mining will be far less disruptive to the environment than terrestrial mining: there will he no piles of waste rock, since the deposits arc directly on the sea floor. And whereas the oil industry lays pipelines underwater, mining would not leave any permanent structures behind. But governments will need to be convinced of the merit of these arguments before mining can begin. What do we know from the first paragraph
培训是一种成本，应该尽量降低，能省则省。( )
微信支付 
支付宝支付