更多“在物流活动中起着神经系统作用的是（ ）。 A．运输 B．仓储”相关的问题
磁性物质是指（）。
A.磁场周围的物质
B.容易被磁化的物质
C.通电的导体周围的物质
D.金属铁
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艾迪思认为企业的生命周期包括三个阶段十个时期，其中官僚期处于哪个阶段（）
A.萌芽阶段B.成长阶段C.成熟阶段D.老化阶段
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当电流不是从一个支路向另一个支路转移，而是在支路内部终止流通而变为零，则称为（）
A.换相
B.转移
C.流通
D.熄灭
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在研究过程中，由于社会态度、社会规范的影响，导致测定值成倾向性的偏大或偏小，这类误差是（）
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体育锻炼的对象是（）、体育教学的对象是（）、运动训练的对象是（）
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在实际工作中,市场调查分析方法主要有两种,即定性分析法和( )。
A. 统计指标 B. 统计分组 C. 调查单位的标志 D. 调查单位的标志表现
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婴儿的辅食最好吃食物的天然味道，不必加盐或调料，尤其加盐会增加（）负担。
A.胃脏
B.肝脏
C.心脏
D.肾脏
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地籍调查成果记录了每一宗地的位置、权属、现状及相关数据等基本信息，科学有效地运用这些（）的资料，就可以做到高起点规划，高标准建设和高效能管理。
A.准确、及时 B.科学、合理 C.准确、合理 D.精确、现势
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#include void main() { int num = 1; int sum = 0; while (num <= 10) { sum += num; num++; } printf("%d", sum); }
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起重机例行保养工作由（）在作业前、作业中（利用间歇时间）和作业后进行。
A.维修工人
B.起重机司机
C.电工
D.指挥手
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“看文字须如法官深刻，方穷究得尽”，这句话是哪位中国古代学者所说？（）
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下列哪本书的发布标志着我国管理会计指引体系的主体部分终于浮出水面（）
A.《会计改革与发展“十三五”规划纲要》
B.《关于全面推进管理会计体系建设的指导意见》
C.《管理会计应用指引》
D.《管理会计基本指引》
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More and more of the world’s supply of seafood is coming from farms. Although 80% of the world’s seafood comes from marine harvests, there is a major shift under way toward aquaculture now. Nearly 40% of salmon marketed today are raised in captivity, compared with 6% a decade ago. Forty percent of all clams, oysters, and mussels are produced in farm environments, along with 65% of freshwater fish. Between 1990 and 1996, fish-farming production rose from 12.4 million to 23 million tons worldwide, writes Anne Platt McGinn in an article for World Watch magazine. "The fact that world seafood supplies continue to increase at all is due almost entirely to the phenomenal growth in aquaculture," says McGinn, a research associate at the World Watch Institute. Commercial aquaculture is driven by rising human population at a time when over harvested wild fish stocks are in decline and conven- tional farm production has leveled off. Biotechnology is contributing to high-yield aquaculture through transgenics--the transfer of genes from one species to another. Researchers introduce desirable genetic traits into fish, creating hardier stocks. For example, some species of fish have a protein that allows them to live in Arctic waters. By transplanting this "anti-freeze" gene into other species, researchers have created more fish that can survive in extremely cold water, according to Ag-West Biotech, Inc., in Saskatchewan, Canada. Biotechnologists are attempting to improve a wide range of genetic traits in fish used for aquaculture, developing fish that are larger and faster-growing, more efficient in converting feed into muscle, more tolerant of low oxygen levels in water, and better able to resist disease. Researchers also are seeking plant-based sources of food as a more efficient alternative to fishmeal. The use of plant protein on fish farms could take some of the pressure off wild fish stocks and address the problem of phosphorous pollution because plants do not contain high phosphorus levels. Wheat, canola, and canola oil are being used as alternative feed for aquaculture, according to Ag-West Biotech, Inc. While aquaculture produces a reliable source of protein, the industry is fife with environmental problems, asserts McGinn. Perhaps the biggest concern is water pollution: Fish waste and uneaten food accumulates at farm sites and can float directly downstream into water supplies. Farm-related nutrient wastes as well as nitrogen and phosphorus also promote the spread of algal "blooms" that deplete oxygen and kill marine life. Aquaculture is also an inefficient user of resources, McGinn charges. Fish farms need protein feed, and about 17% of ocean fish, an over harvested wild resource, becomes food for captive-bred fish. "An estimated five kilograms of oceanic fish reduced into fishmeal are required to raise one kilogram of farmed ocean fish or shrimp, representing a large net protein loss," says McGinn. Fish farming does not have to be an inefficient or polluting industry. McGinn predicts that many consumers will choose sustainably produced fish in the future, just as they prefer dolphin-free tuna today.
A. change feed into muscle more efficiently. B. stand low oxygen levels in water.C. tolerate extremely cold water. D. grow larger and faster.
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( )SWOT分析法包括分析企业面临的优势、劣势、机会和威胁。
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某电力系统的等值网络示于下图。各元件阻抗、导纳均以标幺值标于图中，求节点导纳矩阵。
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