名词解释题embryonic induction
名词解释题
embryonic induction
参考解析
解析：
暂无解析
相关考题：
When an induction motor with 10 polesissupplied by 50Hz three－phase acpower source,the synchronousre volution sperminuteis().(Synchronousr／min=120f／p) A.1000B.900C.700D.600
Passage TwoQuestions 26 to 30 are based on the following passage.The electromagnet was invented in England by William Sturgeon，who took an iron rod and bent it into the shape of a horseshoe. This “horseshoe” was coated with varnish and a layer of copper wire was wrapped around it. An electric current was passed through the wire，thus making the rod magnetic. The rod was now，because of magnetic attraction，able to support nine pounds of iron. In the US，a scientist named Joseph Henry improved on Sturgeon's electromagnet by insulating the copper wine with silk. He was able to wrap many turns of wire around an iron core without danger of short circuits between the turns. His magnet could hold 2,300 pounds. This experiment prompted Henry to try his hand at converting magnetism into electricity. First he coiled some insulated wire around an iron bar. connecting both ends of the wire to a galvanometer(电流表). The iron bar was placed across the poles of the electromagnet. Then the coil of the electromagnet was connected to a battery. The galvanometer indicated a voltage，then dropped to zero. Henry signaled his assistant to disconnect the coil. The galvanometer showed that once again a voltage had been produced，although this time in the opposite direction. The principle of electromagnetic induction had thus been discovered. Unfortunately for Joseph Henry he did not publish his findings and someone else(Faraday)got the credit for the discovery.The principle of electromagnetic was discovered by______.A. William SturgeonB. Joseph HenryC. FaradayD. someone else
is the memory that the computer uses to temporarily store the information as it is being processed.A．Random Access MemeryB．Read Only MemeryC．Induction RegisterD．Cache
Data mining is an(66)research field in database and artificial intelligence. In this paper, the data mining techniques are introduced broadly including its producing background, its application and its classification. The principal techniques used in the data mining are surveyed also, which include rule induction, decision(67), artificial(68)network, genetic algorithm, fuzzy technique, rough set and visualization technique. Association rule mining, classification rule mining, outlier mining and clustering method are discussed in detail. The research achievements in association rule, the shortcomings of association rule measure standards and its(69), the evaluation methods of classification rules are presented. Existing outlier mining approaches are introduced which include outlier mining approach based on statistics, distance-based outlier mining approach, data detection method for deviation, rule-based outlier mining approach and multi-strategy method. Finally, the applications of data mining to science research, financial investment, market, insurance, manufacturing industry and communication network management are introduced. The application(70)of data mining are described.A．intractableB．emergingC．easyD．scabrous
The moral shortsightedness is revealed in the fact that _____.［A］ the government has stopped the experiment on human tissue［B］ the donation consent forms are difficult to understand［C］ the Human Tissues Act is an obstacle to important medical research［D］ embryonic research shows disregard for human life
Part A 2 BBC ‘s Casualty programme on Saturday evening gave viewers a vote as to which of two patients should benefit from a donation. But it failed to tell us that we would not need to make so many life-and-death decisions if we got to grip with the chronic organ shortage. Being pussyfooting around in its approach to dead bodies, the Government is giving a kicking to some of the most vulnerable in our society. One depressing consequence of this is that a significant number of those on the waiting list take off to foreign countries to purchase an organ from a living third-world donor, something that is forbidden in the United Kingdom. The poor have no option but to wait in vain.The Human Tissue Authority’s position on the retention of body parts for medical research after a post-mortem examination is equally flawed. The new consent forms could have been drafted by some evil person seeking to stop the precious flow of human tissue into the pathological laboratory. The forms are so lengthy that doctors rarely have time to complete them and, even if they try, the wording is so graphic that relatives tend to leg it before signing. In consequence, the number of post mortems has fallen quickly.The wider worry is that the moral shortsightedness evident in the Human Tissue Act seems to infect every facet of the contemporary debate on medical ethics. Take the timid approach to embryonic stem cell research. The United States, for example, refuses government funding to scientists who wish to carry out potentially ground-breaking research on the surplus embryos created by IVF treatment.Senators profess to be worried that embryonic research fails to respect the dignity of “potential persons”. Rarely can such a vacuous concept have found its way into a debate claming to provide enlightenment. When is this “potential” supposed to kick in? In case you were wondering, these supposedly precious embryos are at the same stage of development as those that are routinely terminated by the Pill without anyone crying. Thankfully, the British Government has refused the position of the United States and operates one of the most liberal regimes in Europe, in which licences have been awarded to researchers to create embryos for medical research. It is possible that, in years to come, scientists will be able to grow organs in the lab and find cures for a range of debilitating diseases.The fundamental problem with our approach to ethics is our inability to separate emotion from policy. The only factor that should enter our moral and legal deliberations is that of welfare, a concept that is meaningless when applied to entities that lack self-consciousness. Never forget that the research that we are so reluctant to conduct upon embryos and dead bodies is routinely carried out on living, pain-sensitive animals.第6题：Which of the following is true of Sony’s acquisition of Columbia Pictures?［A］ It was motivated by Morita’s desire to project an image of success.［B］ Sony’s top executives were quite convinced of its benefits for the company.［C］ Entertainment industry insiders believed it was the failure of Hollywood.［D］ It was the expensive expansion from electronics into entertainment.
A teacher showed students an example and explained the usage of past perfect tense, and asked students to list ten"past perfect tense" sentences by imitating that example． What's the teacher' s grammar teaching method?A.Consolidation．B.Presentation．C.Deduction．D.Induction．
A teacher handed out a list of twenty"Fature tense" sentences and asked students to discuss and find out the grammatical structures. What is the teacher's grammar teaching method?A．Induction. B．Presentation.C．Consolidation.D．Deduction.
A teacher handed out a list of twenty"Fature tense" sentences and asked students to discuss and find out the grammatical structures. What is the teacher's grammar teaching method?A. Induction.B. Presentation.C. Consolidation.D. Deduction.
Think about when a teacher handed out a list of twenty"Past tense"sentences and asked students to discussand find out the grammatical structures．What is the teacher's grammar teaching method?A.Induction．B.Presentation．C.Consolidation．D.Deduction．
共用题干Clone FarmFactory farming could soon enter a new era of mass production .Companies in the US are developing the technology needed to"clone"chickens on a massive scale.Once a chicken with desirable traits has been bred or genetically engineered,tens of thousands of eggs,which will hatch into identical copies,could roll off the production lines every hour. Billions of clones could be produced each year to supply chicken farms with birds that all grow at the same rate,have the same amount of meat and taste the same.This,at least,is the vision of the US's National Institute of Science and Technology,which has given Origen Therapeutics of Burlingame,California,and Embrex of North Carolina $4 .7 million to help fund research.The prospect has alarmed animal welfare groups,who fear it could increase the suffering of farm birds.That's unlikely to put off the poultry industry,however,which wants disease-resistant birds that grow faster on less food."Producers would like the same meat quantity but to use reduced inputs to get there,"says Mike Fitzgerald of Origen.To meet this demand,Origen aims to"create an animal that is effectively a clone",he says.Normal cloning doesn't work in birds because eggs can't be removed and implanted.Instead,the company is trying to bulk-grow embryonic stem cells taken from fertilized eggs as soon as they're laid."The trick is to culture the cells without them starting to distinguish,so they remain pluripotent,"says Fitzgerald.Using a long-established technique,these donor cells will then be injected into the embryo of a freshly laid,fertilized recipient egg,forming a chick that is a"chimera".Strictly speaking a chimera isn't a clone,because it contains cells from both donor and recipient. But Fitzgerald says it will be enough if,say,95 percent of a chicken's body develops from donor cells."In the poultry world,it doesn't matter if it's not 100 percent."he says.Another challenge for Origen is to scale up production .To do this,it has teamed up with Embrex,which produces machines that can inject vaccines into up to 50,000 eggs an hour. Embrex is now trying to modify the machines to locate the embryo and inject the cells into precisely the right spot without killing it.In future,Origen imagines freezing stem cells from different strains of chicken.If orders come in for a particular strain,millions of eggs could be produced in months or even weeks.At present, maintaining all the varieties the market might call for is too expensive for breeders and it takes years to bread enough chickens to produce the billions of eggs that farmers need. Which institution has offered $4 .7 million to fund the research?A: The US's National Institute of Science and Technology.B: Origen Therapeutics of Burlingame,California.C: Embrex of North Carolina.D: Animal welfare groups.
同源重组（homologous recombination）与胚胎干细胞（embryonic stem cell）结合起来，创造了基因打靶技术（gene targeting），并得到基因敲除模型，获得了（）年的诺贝尔奖A、2006B、2007C、2008D、2009
单选题The device that most commonly utilizes the principle of electromagnetic induction is the（）.AdiodeBtransformerCtransistorDrheostat
单选题关于自由感应衰减（free induction decay，FID），错误的是（ ）。A弛豫过程中Mxy幅度按指数方式不断衰减B感应电流随时间周期性不断衰减形成振荡电流C因为是自由进动感应产生的，称为自由感应衰减D90°RF脉冲后，受纵向弛豫和横向弛豫时间的影响，磁共振信号以指数曲线形式衰减EFID信号瞬间幅度与时间无对应的关系
单选题An AC synchronous transmission type remote steering control system consists of a （）.Atransmitter at the steering station and a receiver at the steering engineBreversible motor at the steering station geared to the steering pumpsCsmall induction motor on the bridge which controls the redder through pulleysDvariable displacement hydraulic pump driven by a reversible DC motor
单选题Which one of the following information can not be found in engine room induction according to the passage?（）Aspecial precautions to deal with heatBengine room safety procedures such as earmuffs, safety glasses, work clothesCemergency escapesDthe location of safety equipment around the ship
问答题Passage 2 A new form of cloning to provide every baby with an embryonic “twin”, from which spare body parts could be grown and life threatening diseases treated is expected to be approved within weeks by senior government advisers on medical ethics. If their report is accepted by ministers, it would mean that Britain—which 20 years ago pioneered the test tube baby and last year produced Dolly, the world’s first cloned mammal—could be the first to clone a human embryo. A working party from the Human Fertilisation and Embryology Authority (HFEA) and the Human Genetics Advisory Commission is expected to come down firmly against reproductive cloning, the process of replicating a living human being. It is expected to recommend government support of so called stem ceils. Stem cells are extracted and used to grow spare parts, treat diseases such as Alzheimer’s and Parkinson’s or address the debilitating effects of cancer, strokes and heart attacks. Dr Austin Smith, the scientist likely to be granted the first licence for the work, said that within the next 12 years it would be routine for every baby to have an embryonic clone. “All it takes now is financial investment,” said Smith, director of Edinburgh University’s centre for genome research. The crucial discovery of embryonic stem cells, from which skin, bone, muscles, nerves and vital organs grow, was made earlier this month by scientists in America. In a submission to the HFEA, Smith said that in order to isolate these cells it is only necessary for the embryo to develop in the laboratory for six days, well within the 14-day limit of current regulation. The cells would then be grown and manipulated to make anything from blood or brain cells to tissue for repairing damaged organs and, ultimately, parts that could be transplanted without fear of the host body rejecting them. The development is likely to meet strong opposition from the church. Dr Donald Bruce, Director of the Society, Religion and Technology Project of the church of Scotland Said that creating an embryo in the knowledge that it would then be destroyed was “very disturbing” to most people. Father Paul Murray, secretary to the Catholic bishops joint bio-ethics committee, said that whatever the potential benefits, it should be regarded as “intrinsically evil” because the research depended on the use of foetal material. However, Professor Christine Gosden, professor of genetic medicine at Liverpool University, one of the four senior government advisers on the cloning sub-committee, said there would be no opportunity for abuse. For many years, patients with Parkinson’s disease who did not respond to drugs have been treated with brain cells extracted from aborted foetuses, a practice approved by a committee led by the Rev Dr John Polkinghorne, the prominent ethicist. Gosden said the arguments for the use of aborted foetal cells and therapeutic cloning were similar: “Before you have a disease, it is easy to say, ‘I would not use cells derived from a foetus’, but if you suffer from that disease, and that is your only hope, your approach can be quite different.” 1. What is the new form of cloning discussed in the passage? What is the purpose of such cloning? 2. Summarise the different views on embryo cloning discussed in the passage. 3. Explain the statement “All it takes now is financial investment.” in para. 6. 4. What is the significance of the discovery of embryonic stem cells?
单选题同源重组（homologous recombination）与胚胎干细胞（embryonic stem cell）结合起来，创造了基因打靶技术（gene targeting），并得到基因敲除模型，获得了（）年的诺贝尔奖A2006B2007C2008D2009
名词解释题Embryonic stem cell