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化学中的VOC（Volatile Organic Comounds）是指（）
- A、挥发性有机化合物
- B、高挥发性无机化合物
- C、所有的水体污染物
- D、所有的大气污染物
参考答案
更多 “化学中的VOC（Volatile Organic Comounds）是指（）A、挥发性有机化合物B、高挥发性无机化合物C、所有的水体污染物D、所有的大气污染物” 相关考题
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Volatile:a) What does the keyword volatile mean? Give an exampleb) Can a parameter be both const and volatile? Give an examplec) Can a pointer be volatile? Give an example
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Organic Food:Why?1 Europe is now the biggest market for organic food in the world,expanding by 25 percent a year over the past 10 years.So what is the attraction of organic food for some people?The really important thing is that organic sounds more"natural".Eating organic is a way of defining oneself as natural,good,caring, different from the junk-food-eating masses.2 Unlike conventional farming,the organic approach means farming with natural,rather than man- made , fertilisers and pesticides. Techniques such as crop rotation（轮种）improve soil quality and helporganic farmers compensate for the absence of man-made chemicals.As a method of food production,organic is,however,inefficient in its use of labour and land;there are severe limits to how much food can be pro- duced.Also,the environmental benefits of not using artificial fertilisers are tiny compared with the amount of carbon dioxide emitted（排放）by transporting food.3 Organic farming is often claimed to be safer than conventional farming. Yet studies into organic farming worldwide continue to reject this claim.An extensive review by the UK Food Standards Agency foundthat there was no statistically significant difference between organic and conventional crops.Even where re-sults indicated there was evidence of a difference,the reviewers found no sign that these differences would have any noticeable effect on health.4 The simplistic claim that organic food is more nutritious than conventional food was always likely to be misleading. Food is a natural product,and the health value of different foods will vary for a number of rea-sons,including freshness,the way the food is cooked,the type of soil it is grown in,the amount of sunlight and rain crops have received,and so on.Likewise,the flavour of a carrot has less to do with whether it was fertilised with manure（粪便）or something out of a plastic sack than with the variety of carrot and how long ago it was dug up.5 The notion that organic food is safer than"normal"food is also contradicted by the fact that many of our most common foods are full of natural toxins（毒素）.As one research expert says : " People think that the more natural something is,the better it is for them.That is simply not the case.In fact,it is the opposite that is true:the closer a plant is to its natural state,the more likely it is that it will poison you.Naturally, many plants do not want to be eaten,so we have spent 10,000 years developing agriculture and breeding out harmful traits from crops."Paragraph 4________A:Factors That Affect Food Health ValueB:Main Reason for the Popularity of Organic FoodC:Testing the Taste of Organic FoodD:Research Into Whether Organic Food Is Better E:Necessity to Remove Hidden Dangers From FoodF:Description of Organic Farming
考题
共用题干
Organic Food:Why?1 Europe is now the biggest market for organic food in the world,expanding by 25 percent a year over the past 10 years.So what is the attraction of organic food for some people?The really important thing is that organic sounds more"natural".Eating organic is a way of defining oneself as natural,good,caring, different from the junk-food-eating masses.2 Unlike conventional farming,the organic approach means farming with natural,rather than man- made , fertilisers and pesticides. Techniques such as crop rotation（轮种）improve soil quality and help organic farmers compensate for the absence of man-made chemicals.As a method of food production,organic is,however,inefficient in its use of labour and land;there are severe limits to how much food can be pro- duced.Also,the environmental benefits of not using artificial fertilisers are tiny compared with the amount of carbon dioxide emitted（排放）by transporting food.3 Organic farming is often claimed to be safer than conventional farming. Yet studies into organic farming worldwide continue to reject this claim.An extensive review by the UK Food Standards Agency found that there was no statistically significant difference between organic and conventional crops.Even where re- sults indicated there was evidence of a difference,the reviewers found no sign that these differences wouldhave any noticeable effect on health.4 The simplistic claim that organic food is more nutritious than conventional food was always likely to be misleading. Food is a natural product,and the health value of different foods will vary for a number of rea- sons,including freshness,the way the food is cooked,the type of soil it is grown in,the amount of sunlight and rain crops have received,and so'on.Likewise,the flavour of a carrot has less to do with whether it was fertilised with manure（粪便）or something out of a plastic sack than with the variety of carrot and how long ago it was dug up.5 The notion that organic food is safer than"normal"food is also contradicted by the fact that many of our most common foods are full of natural toxins（毒素）.As one research expert says: "People think that the more natural something is,the better it is for them.That is simply not the case.In fact,it is the opposite that is true:the closer a plant is to its natural state,the more likely it is that it will poison you.Naturally, many plants do not want to be eaten,so we have spent 10,000 years developing agriculture and breeding out harmful traits from crops."Paragraph 1_______A:Factors That Affect Food Health ValueB:Main Reason for the Popularity of Organic FoodC:Testing the Taste of Organic FoodD:Research Into Whether Organic Food is BetterE:Necessity to Remove Hidden Dangers From FoodF:Description of Organic Farming
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在施工阶段，施工人员涂刷了高VOC涂料，如何改正错误仍然获得EQ低挥发材料得分（）。A、低VOC涂料覆盖高VOC涂料B、任何计算都减掉高VOC涂料C、在基线值和设计值VOC计算值都包含高VOC涂料D、在设计值VOC减掉高VOC涂料
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使用读秀图书搜索（http://www.duxiu.com/），查找2009年出版的书名中有“organic chemistry”的中文图书（）。 A、《有机化学 Organic chemistry eng》B、《有机化学 Organic chemistry 中文版 eng》C、《有机化学中的光谱方法 ORGANIC 6TH EDITION CHEMISTRY》D、《Organic Chemistry有机化学》
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volatile关键字的说法错误的是（）。A、能保证线程安全B、volatile关键字用在多线程同步中，可保证读取的可见性C、JVM保证从主内存加载到线程工作内存的值是最新的D、volatile能禁止进行指令重排序
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挥发性有机物指常温常压下能够挥发或气态的有机物，世界卫生组织（WHO，1989）定义熔点低于室温、沸点在（）℃之间的有机物为挥发性有机物，英文Volatile Organic Compounds，简写为VOCs。
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填空题挥发性有机物指常温常压下能够挥发或气态的有机物，世界卫生组织（WHO，1989）定义熔点低于室温、沸点在（）℃之间的有机物为挥发性有机物，英文Volatile Organic Compounds，简写为VOCs。
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