题目内容
硬导体选择。由2000kv·A,10kV/0.38kV变压器供电的低压配电柜选用硬铝母线涂漆矩形铝母线，环境35℃时，100mm×10mm载流量1600A;125mm×10mm载流量 1820A;100mm×10mm二根载流量2860A;125mm×10mm二根载流量3200A。0.38kV母线最大短路电流I"＝40kA,Kch＝1.8,ich＝2.55I"。柜宽800mm，β＝1,σx忽略；母线竖放。 (1)按持续电流选择硬导体截面面积应为( )mm2。
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关于人力资源管理与人事管理关系的陈述，正确的是( )。
血清钾浓度低于 __________ mmol／L称为低钾血症。其产生原因为： __________ 、 __________ 、 __________ 。
People in Britain are living longer and are better off, with the result that more and more money is being spent on consumer goods, (56) the latest statistics.But while people (57) appear to be healthier find (58) , an analysis of (59) activities suggests they are also lazier, (60) the most popular pastime is watching television, with 98 percent of homes having (61) one set and over a third (62) a video recorder.Other pastimes (63) listening to music, gardening, sports, visiting friends or going out for a meal. The 56.8 million people of England, Scotland, Wales and Northern Ireland (64) an (65) 12 million household pets.Most of the homes now have central heating, washing machines, refrigerators, telephones and even cars.Britain are also (66) . United Kingdom residents took over 17 (67) holidays overseas in 1986, (68) 15. 75 million in 1985, and the most popular destinations were (69) Spain, France and Greece.More people are eating meal out and (70) lifestyles have changed, the consumption of take—away meals, convenience foods and so—called fast food has also (71) . over the past 25years, consumption of (72) coffee, processed foods, fruit and vegetables has risen (73) home consumption of beef, lamb, bread, potatoes, butter, sugar and tea has (74) .Alcohol consumption is continuing its rise but the types of drinks taken has changed. Beer remains the most popular, but lager (淡啤酒) now (75) more than half of beer sales and there has been a switch from whisky to other spirits.And those of us who survive and prosper can expect to live th the age of 71 for men and 77 for women a tear longer than in 1985. 74().
People in Britain are living longer and are better off, with the result that more and more money is being spent on consumer goods, (56) the latest statistics.But while people (57) appear to be healthier find (58) , an analysis of (59) activities suggests they are also lazier, (60) the most popular pastime is watching television, with 98 percent of homes having (61) one set and over a third (62) a video recorder.Other pastimes (63) listening to music, gardening, sports, visiting friends or going out for a meal. The 56.8 million people of England, Scotland, Wales and Northern Ireland (64) an (65) 12 million household pets.Most of the homes now have central heating, washing machines, refrigerators, telephones and even cars.Britain are also (66) . United Kingdom residents took over 17 (67) holidays overseas in 1986, (68) 15. 75 million in 1985, and the most popular destinations were (69) Spain, France and Greece.More people are eating meal out and (70) lifestyles have changed, the consumption of take—away meals, convenience foods and so—called fast food has also (71) . over the past 25years, consumption of (72) coffee, processed foods, fruit and vegetables has risen (73) home consumption of beef, lamb, bread, potatoes, butter, sugar and tea has (74) .Alcohol consumption is continuing its rise but the types of drinks taken has changed. Beer remains the most popular, but lager (淡啤酒) now (75) more than half of beer sales and there has been a switch from whisky to other spirits.And those of us who survive and prosper can expect to live th the age of 71 for men and 77 for women a tear longer than in 1985. 72().
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