leukocyte differentiation antige

题目

leukocyte differentiation antigen (LDA)

参考答案和解析
正确答案:白细胞分化抗原是白细胞(还包括血小板、血管内皮细胞等)在正常分化成熟不同谱系和不同阶段以及活化过程中,出现或消失的细胞表面标记。
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相似问题和答案

第1题:

4 David Silvester is the founder and owner of a recently formed gift packaging company, Gift Designs Ltd. David has

spotted an opportunity for a new type of gift packaging. This uses a new process to make waterproof cardboard and

then shapes and cuts the card in such a way to produce a container or vase for holding cut flowers. The containers

can be stored flat and in bulk and then simply squeezed to create the flowerpot into which flowers and water are then

put. The potential market for the product is huge. In the UK hospitals alone there are 200,000 bunches of flowers

bought each year for patients. David’s innovative product does away with the need for hospitals to provide and store

glass vases. The paper vases are simple, safe and hygienic. He has also identified two other potential markets; firstly,

the market for fresh flowers supplied by florists and secondly, the corporate gift market where clients such as car

dealers present a new owner with an expensive bunch of flowers when the customer takes delivery of a new car. The

vase can be printed using a customer’s design and logo and creates an opportunity for real differentiation and impact

at sales conferences and other high profile PR events.

David anticipates a rapid growth in Gift Designs as its products become known and appreciated. The key question is

how quickly the company should grow and the types of funding needed to support its growth and development. The

initial financial demands of the business have been quite modest but David has estimated that the business needs

£500K to support its development over the next two years and is uncertain as to the types of funding best suited to

a new business as it looks to grow rapidly. He understands that business risk and financial risk is not the same thing

and is looking for advice on how he should organise the funding of the business. He is also aware of the need to avoid

reliance on friends and family for funding and to broaden the financial support for the business. Clearly the funding

required would also be affected by the activities David decides to carry out himself and those activities better provided

by external suppliers.

Required:

(a) Provide David with a short report on the key issues he should take into account when developing a strategy

for funding Gift Designs’ growth and development. (10 marks)


正确答案:

(a) To: David Silvester
From:
Funding strategy for Gift Designs Ltd
Clearly, you have identified a real business opportunity and face both business and financial risks in turning the opportunity
into reality. One possible model you can use is that of the product life cycle which as a one-product firm is effectively the life
cycle for the company. Linking business risk to financial risk is important – in the early stages of the business the business
risk is high and the high death rate amongst new start-ups is well publicised and, consequently, there is a need to go for low
financial risk. Funding the business is essentially deciding the balance between debt and equity finance, and equity offers the
low risk that you should be looking for. As the firm grows and develops so the balance between debt and equity will change.
A new business venture like this could in Boston Box terms be seen as a problem child with a non-existent market share but
high growth potential. The business risks are very high and consequently the financial risks taken should be very low and
avoid taking on large amounts of debt with a commitment to service the debt.
You need to take advantage of investors who are willing to accept the risks associated with a business start-up – venture
capitalists and business angels accept the risks associated with putting equity capital in but may expect a significant share
in the ownership of the business. This they will seek to realise once the business is successfully established. As the business
moves into growth and then maturity so the business risks will reduce and access to debt finance becomes feasible and cost
effective. In maturity the business should be able to generate significant retained earnings to finance further development.

Dividend policy will also be affected by the stage in the life cycle that the business has reached.
Yours,

第2题:

Between about 1910 and 1930, new artistic movements in European art were making themselves felt in the United States. American artists became acquainted with the new art on their trips to Paris and at the exhibitions in the famous New York gallery “291”( named after its address on Fifth Avenue) of the photographer Alfred Stieglitz. But most important in the spread of the modern movements in the United States was the sensational Armory Show of the 1913 held in New York, in which the works of many of the leading European artists were seen along with the works of a number of progressive American painters. Several of the American modernists who were influenced by the Armory Show found the urban landscape, especially New York, an appealing subject. Compared with the works of the realist painters, the works of American modernists were much further removed from the actual appearance of the city; they were more interested in the “feel “ of the city, more concerned with the meaning behind appearance. However, both the painters of the Ash Can School” and the later realists were still tied to nineteenth-century or earlier styles, while the early modernists shared in the international breakthroughs of the art of the twentieth century.The greatest of these breakthroughs was Cubism, developed most fully in France between 1907 and 1914, which brought about a major revolution in Western painting. It overturned the regional tradition that had been built upon since the Renaissance. In cubism, natural forms were broken down analytically into geometric shapes. No longer was a clear differentiation made between the figure and the background of a painting: the objects represented and the surface on which they were painted became one. The Cubists abandoned the conventional single vantage point of the viewer, and objects depicted from multiple viewpoints were shown at the same way.

51.What’s the main topic of the passage?

A. Modern art movements in the United States.

B. The great influence of Cubism.

C. Several American modernists found urban landscape an appealing subject.

D. Contemporary artists in the United States.

52.Which of the following is not mentioned as a means through which American artists learned about new movements?

A. Trips to Paris.

B. Lectures by European artists.

C. The exhibitions in the famous New York gallery “291”.

D. The sensational Armory Show in 1913.

53.What was exhibited on the sensational Armory Show of 1913 in New York?

A. Works of many leading European artists as well as works of many progressive American painters.

B. Works of all the European artists and American painters.

C. Works of a number of American modernists and painters of the “Ash Can School”.

D. Works of European artists only.

54.According to the author, which of the following was a major new movement in twentieth-century art?

A. Impressionism.

B. Cubism.

C. The rational tradition.

D. Realism.

55.What do we know about Cubism?

A. It made a clear differentiation between the figure and the background of a painting.

B. Natural forms were broken down analytically into shape of a square.

C. The object represented and the surface on which they were painted became one.

D. The Cubists preserved the conventional single vantage point of the viewer.


参考答案:
51.A52.C53.A54.B55.D

第3题:

Control chart theory is based on the differentiation of the causes of variations in quality. Variations may be produced by assignable causes. All of the following are examples of assignable causes except:

A . differences among machines.

B . differences among workers.

C . differences among materials.

D . differences in each of these factors over time.

E . None of the above (all are examples)


正确答案:E

第4题:

白细胞分化抗原(leukocyte differentiation antigen)


正确答案: 是指血细胞在分化成熟为不同谱系、分化的不同阶段及细胞活化过程中,出现或消失的细胞表面标志,广泛表达在白细胞、红细胞、巨噬细胞、血小板谱系及非造血细胞上。

第5题:

共用题干
第二篇

Bone Marrow Transplantation

Bone marrow is the spongy tissue inside some of your bones,such as your hip and thigh bones. It contains immature cells,called stem cells.The stem cells can develop into the red blood cells that carry oxygen through your body,the white blood cells that fight infections,and the platelets that help with blood clotting.
If there is a problem with your bone marrow,a transplant can give you healthy new marrow. You could need a transplant because of a disease,such as bone marrow diseases or cancers like leukemia kemia or lymphoma.Or you might need one if a strong cancer treatment kills your healthy blood cells.
People with cancer sometimes donate bone marrow before treatment to be transplanted later. But often the new marrow comes from a donor,either a close family member or someone unrelated.
The healthy cells for a transplant can come from three sources:bone marrow;peripheral (circulating) blood that has an increased number of healthy blood-forming cells(also called peripheral blood stem cells or PBSC);umbilical cord blood that is collected after a baby is born.
If you need an allogeneic transplant,your doctor will look for a marrow donor or cord blood unit that matches your HLA tissue type.HLA stands for human leukocyte antigen,a markei your immune system uses to recognize which cells belong in your body and which do not.
Before your body can receive the healthy cells,the diseased cells must be destroyed.This is done using chemotherapy and sometimes radiation. The destruction of diseased cells is called a preparative regimen or a conditioning regimen.
On the day of transplant,the cells from the marrow donor or cord blood unit are infused intravenously(go into your body through a large vein).These healthy cells move into the spaces inside your bones where they create new marrow. They grow and make healthy new red blood cells,white blood cells,and platelets.

Before receiving healthy cells,diseased cells must_________.
A:undergo chemotherapy
B:go through radiation
C:be prepared
D:be wrecked

答案:D
解析:
细节题。第三段最后一句:通常新骨髓来源于一个捐献者,或者是血缘亲近的家人,或者是无血缘关系的陌生人。B不全面,C“器官捐献者”,也不正确。
词义推断题。第一段第二句:它包括不成熟的细胞,被称作干细胞。A是 “主要的”,B是“杰出的”,D是“重要的”,只有C是“发育不完全的”。
细节题。由第四段可以看出,A、C、D都是文章提到的,只有B"婴儿的血液”除外。
细节题。倒数第二段提到了生病的细胞一定要被破坏掉,A和B都是破坏的方式,都不全面。C意思不明,且与文义不符。D的意思是被彻底破坏掉。
推断题。A选项文章没有提及。C选项语气过于绝对,文章中没有如此说明。第三段第一句说癌症患者有时会在治疗前捐出骨髓用于日后的移植,D选项说必须,则是不正确的。从文章中可以看出,骨髓移植是很复杂的,因此B选项是可以推断出来的。

第6题:

Product differentiation产品差别


参考答案:

类似商品之间存在着的使它们不至于成为完全替代品的因素。如,因位置差别使得在不同地点出售的同型号的汽油成为不完全的替代品。具有产品差别的企业面对的是向下倾斜的需求曲线,而不是完全竞争情况下的那种水平的需求曲线。


第7题:

【T1】

A.HANDLE

B.ON

C.CONTINUED TO A.THE TREND WAS NATURALLY MOST OBVIOUS IN THOSE AREAS OF SCIENCE BASED ESPECIALLY【T1】______A MATHEMATICAL OR LABORATORY TRAINING

B.AMATEURS, ON THE OTHER HAND, HAVE【T2】______PURSUE LOCAL STUDIES

C.ONE MAN COULD CONTINUE TO【T3】______THE INFORMATION SPECIALIZATION CAN BE SEEN AS A RESPONSE TO THE PROBLEM OF AN INCREASING ACCUMULATION OF SCIENTIFIC KNOWLEDG

E.BY SPLITTING UP THE SUBJECT MATTER INTO SMALLER UNITS,【T4】_____AND USE IT AS THE BASIS FOR FURTHER RESEARC

H.BUT SPECIALIZATION WAS ONLY ONEOF A SERIES OF RELATED DEVELOPMENTS IN SCIENCE AFFECTING THE PROCESS OF COMMUNICATIO

N.ANOTHER WAS THE GROWING PROFESSIONALISATION OF SCIENTIFIC ACTIVITY. NO CLEAR-CUT DISTINCTION CAN BE DRAWN BETWEEN PROFESSIONALS AND AMATEURS IN SCIENCE:EXCEPTIONS CAN BE FOUND TO ANY RUL

E.NEVERTHELESS, THE WORD "AMATEUR" DOES CARRY A CONNOTATION THAT THE PERSON CONCERNED IS NOT FULLY INTEGRATED INTO THE SCIENTIFIC COMMUNITY AND, IN PARTICULAR, MAY NOT FULLY SHARE ITS VALUES.THE GROWTH OF SPECIALIZATION IN THE NINETEENTH CENTURY, WITH ITS CONSEQUENT REQUIREMENT OF A LONGER, MORE COMPLEX TRAINING, IMPLIED GREATER PROBLEMS FOR AMATEUR PARTICIPATION IN SCIENC

E.【T5】______, AND CAN BE ILLUSTRATED IN TERMS OF THE DEVELOPMENT OF GEOLOGY IN THE UNITED KINGDO

M. A COMPARISON OF BRITISH GEOLOGICAL PUBLICATIONS OVER THE LAST CENTURY AND A HALF REVEALS NOT SIMPLY AN INCREASING EMPHASIS ON THE PRIMACY OF RESEARCH, BUT ALSO A CHANGING DEFINITION OF WHAT CONSTITUTES AN ACCEPTABLE RESEARCH PAPER.THUS, IN THE NINETEENTH CENTURY, LOCAL GEOLOGICAL STUDIES REPRESENTED WORTHWHILE RESEARCH IN THEIR OWN RIGHT; BUT, IN THE TWENTIETH CENTURY,LOCAL STUDIES HAVE INCREASINGLY BECOME ACCEPTABLE TO PROFESSIONALS ONLY IFTHEY INCORPORATE, AND REFLECT ON, THE WIDER GEOLOGICAL PICTUR

E.【T6】______ IN THEOLD WAY.THE OVERALL RESULT HAS BEEN TO MAKE ENTRANCE TO PROFESSIONAL GEOLOGICAL JOURNALS HARDER FOR AMATEURS, A RESULT THAT HAS BEEN REINFORCED BY THE WIDESPREAD INTRODUCTION OF REFEREEING, FIRST BY NATIONAL JOURNALS IN THE NINETEENTH CENTURY AND THEN BY SEVERAL LOCAL GEOLOGICAL JOURNALS IN THE TWENTIETH CENTURY.AS A LOGICAL CONSEQUENCE OF THIS DEVELOPMENT, SEPARATE JOURNALS HAVE NOW APPEARED AIMED MAINLY TOWARDS EITHER PROFESSIONAL OR AMATEUR READERSHIP.A RATHER SIMILAR PROCESS OF DIFFERENTIATION HAS LED TO PROFESSIONAL GEOLOGISTS COMING TOGETHER NATIONALLY WITHIN ONE OR TWO SPECIFIC SOCIETIES, WHEREAS THE AMATEURS HAVE TENDED EITHER TO REMAIN IN LOCAL SOCIETIES OR TO COME TOGETHER NATIONALLY IN A DIFFERENT WAY.


正确答案:on
本题主要考查固定搭配。“bebasedon”为固定搭配,是“根据,以……为基础”的意思,符合题意。所以,答案是on。

第8题:

195 Control chart theory is based on the differentiation of the causes of variations in quality. Variations may be produced by assignable causes. All of the following are examples of assignable causes except:

A. differences among machines.

B. differences among workers.

C. differences among materials.

D. differences in each of these factors over time.

E. None of the above (all are examples)


正确答案:E

第9题:

共用题干
第二篇

Bone Marrow Transplantation

Bone marrow is the spongy tissue inside some of your bones,such as your hip and thigh bones. It contains immature cells,called stem cells.The stem cells can develop into the red blood cells that carry oxygen through your body,the white blood cells that fight infections,and the platelets that help with blood clotting.
If there is a problem with your bone marrow,a transplant can give you healthy new marrow. You could need a transplant because of a disease,such as bone marrow diseases or cancers like leukemia kemia or lymphoma.Or you might need one if a strong cancer treatment kills your healthy blood cells.
People with cancer sometimes donate bone marrow before treatment to be transplanted later. But often the new marrow comes from a donor,either a close family member or someone unrelated.
The healthy cells for a transplant can come from three sources:bone marrow;peripheral (circulating) blood that has an increased number of healthy blood-forming cells(also called peripheral blood stem cells or PBSC);umbilical cord blood that is collected after a baby is born.
If you need an allogeneic transplant,your doctor will look for a marrow donor or cord blood unit that matches your HLA tissue type.HLA stands for human leukocyte antigen,a markei your immune system uses to recognize which cells belong in your body and which do not.
Before your body can receive the healthy cells,the diseased cells must be destroyed.This is done using chemotherapy and sometimes radiation. The destruction of diseased cells is called a preparative regimen or a conditioning regimen.
On the day of transplant,the cells from the marrow donor or cord blood unit are infused intravenously(go into your body through a large vein).These healthy cells move into the spaces inside your bones where they create new marrow. They grow and make healthy new red blood cells,white blood cells,and platelets.

We can infer from this passage that_________.
A:bone marrow transplantation requires five procedures
B:bone marrow transplantation is complex
C:people with leukemia must need transplantation
D:people with cancer must donate bone marrow before treatment

答案:B
解析:
细节题。第三段最后一句:通常新骨髓来源于一个捐献者,或者是血缘亲近的家人,或者是无血缘关系的陌生人。B不全面,C“器官捐献者”,也不正确。
词义推断题。第一段第二句:它包括不成熟的细胞,被称作干细胞。A是 “主要的”,B是“杰出的”,D是“重要的”,只有C是“发育不完全的”。
细节题。由第四段可以看出,A、C、D都是文章提到的,只有B"婴儿的血液”除外。
细节题。倒数第二段提到了生病的细胞一定要被破坏掉,A和B都是破坏的方式,都不全面。C意思不明,且与文义不符。D的意思是被彻底破坏掉。
推断题。A选项文章没有提及。C选项语气过于绝对,文章中没有如此说明。第三段第一句说癌症患者有时会在治疗前捐出骨髓用于日后的移植,D选项说必须,则是不正确的。从文章中可以看出,骨髓移植是很复杂的,因此B选项是可以推断出来的。

第10题:

HLA抗原(human leukocyte antigen)


正确答案:是人类主要组织相容性抗原,由人第6号染色体短臂上的HLA基因编码,具有控制同种移植排斥反应、免疫应答和免疫调节等复杂功能。

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