| 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 fa A. No mineral companies have succeeded in deep-sea mining. B. Oil and gas have been regarded as the most useful deep-sea wealth. C. Only oil and gas industry has been interested in deep-sea mining. D. The deep-sea mineral wealth has recently become the dream of miners. [填空题]It is difficult to imagine what life would be like without memory. The meanings of thousands of everyday perceptions, the bases 【B1】 the decisions we make, and the roots of our habits and skills are to be 【B2】 in our past experiences, which are brought into the present 【B3】 memory.
Memory can be defined as the capacity to keep 【B4】 available for later use. It includes not only "remembering" thing like arithmetic or historical facts, but also any change in the way an animal typically behaves. Memory is 【B5】 when a rat gives up eating grain because he has sniffed something suspicious in the grain pile. Memory is also involved when a six year old child learns to swing a baseball bat.
Memory 【B6】 not only in humans and animals but also in some physical objects and machines. Computers, for example, contain devices for storing data for later use. It is interesting to compare the memory storage capacity of a computer 【B7】 that of a human being. The instant access memory of a large c
A. A．kept B．found C．sought D．stored 我来回答: 提交
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