搜题
问题详情
[填空题]溶于水中的盐类都是呈离子状态存在的，但在水处理工艺学中，为了便于分析研究问题，有时故意将主要阴、阳离子相互结合组合成假想化合物，其组合原则，是（）。
相关热点： 工艺学 阳离子 分析研究 化合物
未搜索到的试题可在搜索页快速提交，您可在会员中心"提交的题"快速查看答案。
收藏该题
查看答案
搜题
相关问题推荐
商品的工艺学性能，是指构成商品的为满足商品（）的需要而必须具备的性能。
A、美观
B、加工包装
C、使用价值
D、生产加工工艺
[填空题]根据水中离子假想结合方法，从水处理工艺学的需要出发，可将天然水分成碳酸盐型和非碳酸盐型，前者〔HCO3－〕＞（），后者〔HCO3－〕＜（）。
共用题干
The Gene Industry
Major companies are already in pursuit of commercial applications of the new biology.They dream of placing enzymes（酶）in the automobile to monitor exhausts and send data on pollution to a microprocessor（微处理机）that will then adjust the engine. They speak of what the New York
Times calls “metal-hungry microbes（渴望吃金属的微生物）that might be used to mine valuable trace metals from ocean water”.They have already demanded and won the right to patent new lifeforms.
Nervous critics,including many scientists,wony that there is corporate,national,intema- tional , and inter-scientific rivalry in the entire biotechnological（生物工艺学）field. They create images not of oii spills,but of“microbe spills”that could spread disease and destroy entire pop- ulations. The creation and accidental release of extremely poisonous microbes,however,is only one cause for alarm.Completely rational and respectable scientists are talking about possibilities that stagger the imagination.
Should we breed people with cow-like stomachs so they can digest grass and hay,thereby relieving the food problem by modifying us to eat lower down on the food chain?Should we biologi- cally alter workers to fit the job requirement,for example,creating pilots with faster reaction times or assembly-line workers designed to do our monotonous work for us?Should we attempt to eliminate“inferior”people and breed a“super-race”?(Hitler tried this,but without the genetic weaponry that may soon issue from our laboratories.)Should we produce soldiers to do our fighting? Should we use genetic forecasting to pre-eliminate“unfit”babies?Should we grow reserve organs for ourselves,each of us having,as it were,a“savings bank”full of spare kidneys,livers or hands?
Wild as these notions may sound,every one has its advocates(and opposers)in the scientific community as well as its striking commercial application.As two critics of genetic engineering,
Jeremy Rifkin and Ted Howard,state in their book Who Should Play God?“Broad scale genetic engineering will probably be introduced to America much the same way as assembly lines,automobiles,vaccines,computers and all the other technologies.As each new genetic advance becomes commercially practical,a new consumer need will be exploited and a market for the new technology will be created.”
According to the passage,the exhaust from a car engine could probably be checked by
A: using metal-hungry microbes
B: making use of enzymes
C: adjusting the engine
D: patenting new lifeforms
The Gene Industry
Major companies are already in pursuit of commercial applications of the new biology.They dream of placing enzymes（酶）in the automobile to monitor exhausts and send data on pollution to a microprocessor（微处理机）that will then adjust the engine. They speak of what the New York
Times calls “metal-hungry microbes（渴望吃金属的微生物）that might be used to mine valuable trace metals from ocean water”.They have already demanded and won the right to patent new lifeforms.
Nervous critics,including many scientists,wony that there is corporate,national,intema- tional , and inter-scientific rivalry in the entire biotechnological（生物工艺学）field. They create images not of oii spills,but of“microbe spills”that could spread disease and destroy entire pop- ulations. The creation and accidental release of extremely poisonous microbes,however,is only one cause for alarm.Completely rational and respectable scientists are talking about possibilities that stagger the imagination.
Should we breed people with cow-like stomachs so they can digest grass and hay,thereby relieving the food problem by modifying us to eat lower down on the food chain?Should we biologi- cally alter workers to fit the job requirement,for example,creating pilots with faster reaction times or assembly-line workers designed to do our monotonous work for us?Should we attempt to eliminate“inferior”people and breed a“super-race”?(Hitler tried this,but without the genetic weaponry that may soon issue from our laboratories.)Should we produce soldiers to do our fighting? Should we use genetic forecasting to pre-eliminate“unfit”babies?Should we grow reserve organs for ourselves,each of us having,as it were,a“savings bank”full of spare kidneys,livers or hands?
Wild as these notions may sound,every one has its advocates(and opposers)in the scientific community as well as its striking commercial application.As two critics of genetic engineering,
Jeremy Rifkin and Ted Howard,state in their book Who Should Play God?“Broad scale genetic engineering will probably be introduced to America much the same way as assembly lines,automobiles,vaccines,computers and all the other technologies.As each new genetic advance becomes commercially practical,a new consumer need will be exploited and a market for the new technology will be created.”
According to the passage,the exhaust from a car engine could probably be checked by
A: using metal-hungry microbes
B: making use of enzymes
C: adjusting the engine
D: patenting new lifeforms
下列选项中，属于专业知识培训的是（ ）。
A.金属工艺学的学习
B.举办知识竞赛
C.向员工介绍企业理念
D.举办企业文化讲座
[填空题]在水处理工艺学中，采用主要阴、阳离子相互结合成假想化合物的分析研究方法。阴离子和阳离子的结合方式大致是根据锅水中所形成化合物的（）大小次序得出的。离子间应优先组合（）的化合物，假想的化合物中Ca2＋和Mg2＋的（）硬度最易转化为沉淀物，其次是它们的（），而阳离子Na＋和K＋，阴离子Cl－都不易转化为沉淀物。