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高等继续教育 / 国际贸易实务

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网络远程教育期末考试【国际贸易实务】模拟试题
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题型描述: 阅读理解 Space is a dangerous place, not only because of meteors (流星 ) but also because of rays from the sun and other stars. The atmosphere again acts as our protective blanket on earth. Light gets through, and this is essential for plants to make the food which we eat. Heat, too, makes our environment endurable. Various kinds of rays come through the air from outer space, but enormous quantities of radiation from the sun are screened off. As soon as men leave the atmosphere they are exposed to this radiation but their spacesuits or the walls of their spacecraft, if they are inside, do prevent a lot of radiation damage. Radiation is the greatest known danger to explorers in space. The unit of radiation is called “rem”. Scientists have reason to think that a man can put up with far more radiation than 0.1 rem without being damaged; the figure of 60 reins has been agreed on. The trouble is that it is extremely difficult to be sure about radiation damage — a person may feel perfectly well, but the cells of his or her sex organ may be damaged, and this will no be discovered until the birth of deformed children or even grandchildren. Missions of the Apollo flights have had to cross belts of high amount of rems. So far, no dangerous amounts of radiation have been reported, but the Apollo missions have been quite short. We simply do not know yet how men are going to get on when they spend weeks and months outside the protection of the atmosphere, working in a space laboratory. Drugs might help to decrease the damage done by radiation, but no really effective ones have been found so far.英语阅读II

简述中医学中症、证、病的不同含义。中医药学概论

改进后的准则修订了对构成国外经营净投资的货币性项目产生的汇兑差额的处理方法。国家开放大学

小雨与公司因为竞业禁止条款发生劳动争议，下列说法正确的是生活中的法律

根据皮亚杰的认知发展阶段学说，我国的初中生处于哪个认知发展阶段？现代教学设计

在工程施工现场，测量的主要工作是测绘地形图。工程测量