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当前学科：电气巡检员考试
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系统振荡时，电气量是（）变化的。系统短路时，电气量是（）的。
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Majored Finance An increase in students （11）to study economics at university is being attributed to （归因于）the global economic crisis awakening a public thirst for knowledge about how the（12）system works. Applications for degree courses beginning this autumn were up by 15% this January， according to UCAS， the Universities and Colleges Admissions Service. A（13）for the Royal Economic Society said applications to do economics at A-level were also up. Professor John Beath， the president of the society and a leading lecturer at St Andrews University， said his first-year lectures—which are open to students from all departments—were （14）crowds of 400， rather than the usual 250. "There are a large number of students who are not （15）majors， who would like to learn something about it. One of the things I have done this year is to relate my teaching to contemporary （16）in a way that one hasn't traditionally done，" he added. University applications rose 7% last year. But there were rises above average in several subjects. Nursing saw a 15% jump， with people's renewed interest in （17）in the public sector （部门） ，which are seen as more secure in economic crisis. A recent study showed almost two thirds of parents （18）schools should do more to teach pupils about financial matters， and almost half said their children had asked them what was going on， although a （19）of parents felt they did not understand it themselves well enough to explain. Zack Hocking， the head of child trust funds， said： "It's possible that one good thing to（20）from the downturn will be a generation that's financially wiser and better equipped to manage their money through times of economic uncertainty." 18.（）
2×10年12月31日，甲公司库存B材料成本为110万元，市场售价为90万元。B材料是专门用于生产乙产品的。由于B材料市场销售价格下降，市场上用B材料生产的乙产品的市场价格也发生下降，用B材料生产的乙产品的市场价格总额由260万元下降为230万元，将B材料加工成乙产品尚需投入140万元，估计乙产品销售费用及税金为8万元，估计B材料销售费用及税金为5万元。2×10年12月31日B材料的可变现净值为()
女性，47岁，饭后感上腹痛，饱胀，反酸。厌食，嗳气，恶心伴失眠，疲倦。服西药及中药无改善。电子胃镜未发现异常，该病人最可能的诊断（）
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