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[主观题]

This passage in general is about ______.A．Halley and other scientistsB．the orbit of a come

This passage in general is about ______.

A．Halley and other scientists

B．the orbit of a comet

C．Newton and Halley

D．Halley and his discovery

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发布时间：2021-08-14

更多“This passage in general is about ______.A．Halley and other scientistsB．the orbit of a come”相关的问题

第1题

In July 1989, Dr.Fox and a team of scientists achieved a major scientific breakthrou

gh.Fox discovered the gene (基因) that causes cystic fibrosis (膀胱纤维症) (CF).Many geneticists consider it 's one of the most significantdiscoveries in human genetics.Theresults of Fox work have helped scientists developtests that identify carriers of the CFgene.They hope his research could cure CF.a testhas been developed to identify peoplerrying the cystic fibrosis gene.The test isbased on knowing where the gene is locatedhe CF gene is a recessive gene.Thismeans a person can carry one copy of the gene andstill not be affected by the disease.However if this person has children with anothererson who carries the Cf genethere is a 25 chance that their children will inherit twoopies of the gene and sufferfrom the disease.The test identifies whether pat for cysticrents carrythe defective CF gene.Researchers are also using Fox discovery to find a curefibrosis.They areworking to produce a drug that will change the activity of the Cf geneId alsoattempting to replace the defective gene with one that functions properly.Itdifficultto produce a drug that changes the Cf gene but does not affect the 100000thergenes of human.But Fox discovery has at least given a chance for the cure othe CF

1.A person with () of a harmful recessive gene will be affected

A.one copy

B two opies

C.no copies

D three copies.

2.We can find answers to the following questions in the passage except ()

A.Do people with CF live longer than they did in the past.

B Describeused to treat CF

C.Evaluate the current methods used to treat CF

D.Describe the drugs used to treat CF

3.The following statements are true except ()

A Only one quarter of people will have chance to have the disease.

B.Fox discovery help scientist develop tests that identify carriers of the CF gene

C.Scientist has already produced a drug to CF

D.To produce a drug is not easy because it should changes the CF gene but notaffectothers

4.The word “recessive” (line 6) probably means ()

A.hidden

B concealing

C.faint

D covered

5.The best title for the passage would be ()

A.Why People Have CF

B.The Drugs Used to Treat CF

C.The Methods of Curing CF

D.TheSignificance of the DiscoveryCystic Fibrosis Gene

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第2题

Passage Two Modern humans emerged some 250,000 years ago, yet agriculture is a fairly

recent invention, only about 10,000 years old. Many crop plants are rather new additions to our diet: broccoli (a flowering mutant of kale) is thought to be only 500 years old. Most innovation is far more recent still. Although Austrian monk Gregor Mendel's pea plant experiments quietly laid the basic foundations of genetics in the mid-19th century, his work was rediscovered and applied to crop breeding only at the beginning of the 20th century. Further advances have steadily accumulated. The 1940s saw the identification of DNA as genetic material and the adoption, by commercial breeders, of genetic modification - typically by applying chemicals or radiation to DNA to try to make plants with advantageous characteristics. The modifications ultimately led to the green revolution of the 1960s and 1970s, during which time global wheat yields tripled. The 1980s and 1990s saw the commercial adoption of agricultural biotechnology, which has allowed breeders to introduce specific genes into crops from the same or different species. In 2004 the first plant genome was fully sequenced, and since then the number of plant gene sequences in GenBank, the public repository for gene sequence information, has been doubling every two years. Our knowledge is increasing exponentially, as it has been in other fields such as semiconductors and cellular telephony. Our challenge is to increase agricultural yields while decreasing the use of fertilizer, water, fossil fuels and other negative environmental inputs. Embracing human ingenuity and innovation seems the most likely path. Plants did not evolve to serve humans, and their sets of genes are incomplete for our purposes. The integral role of modifying genes is obvious to all breeders, though sometimes painfully absent from the public's understanding of how modern agriculture succeeds. All breeding techniques, from before Mendel's time until today, exploit modifications to plant DNA. These modifications can take the form. of mistakes or mutations that occur during natural cell division in the wild; the natural but random movement of DNA sequences from one part of a plant's genome to another; or the more precise insertion of known gene sequences using biotechnology. In all these cases, plant genes are moved within or across species, creating novel combinations. Hybrid genetics - the combination of different versions of the same gene – has resulted in spectacular yield increases. Largely as the consequence of using hybrid seed varieties, corn yields in the U.S. have increased more than 500 percent in the past 70 years. Questions 6-10 are based on Passage Two.

(1)Which statement is correct according to paragraph one？

A、Broccoli was first bred by Mendel

B、Broccoli wasn’t considered edible until 500 years ago

C、Mendel's work was considered most important in the history of genetics

D、Mendel’s study found its major application some 100 years ago

(2)What was cited as a result of the green revolution？

A、Sharp rise in worldwide wheat production

B、Extensive use of organic fertilizer

C、Large-scale adoption of genetic modification

D、Commercial success of genetically modified seeds.

(3)Which statement is true of GenBank according to the passage？

A、The number of gene sequences has doubled since its foundation

B、The commercial breeders are its main sponsors

C、It is a genetic sequence database

D、It was founded in 2004

(4)It can be learned from the passage that the significance of genetic modification is ______.

A、questioned by some critics

B、poorly conveyed to the public

C、appreciated by all breeders

D、fully understood only by scientists

(5)The word “novel” in paragraph three is closest in meaning to ______.

A、artificial

B、various

C、hybrid

D、new

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第3题

基因（gene）

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第4题

adj.基因的;遗传学的（）

A.genetic

B.gene

C.generate

D.不会

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第5题

结核分子生物学检查包括（）

A.Gene Xpert MTB/BIF

B.结核-DNA

C.结核分枝杆菌LAMP-DNA

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第6题

CRISPR当前应用领域有()。

A.Gene editing

B.Human disease modelling

C.Drug screening

D.Agriculture

E.Creating human with defects

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第7题

It is implied that the main impact that gene transfer between crops and weeds could have i

A．the rapid development of unintended plant hybrids

B．the collapse of the agricultural industry

C．the development of pest and herbicide-resistant weeds

D．the difficulty to determine the given nature of current research

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第8题

英特尔高级院士Gene Meieran认为，创新有三种类型：突破性创新，其特征是打破陈规，改变传统和大步跃进；渐进式创新，特征是采取下一逻辑步骤，让事物越来越美好；运用式创新，特征是采用横向思维，以全新的方式应用原有事物。下列属于运用式创新的有（）

A.铁犁牛耕的应用

B.罗斯福新政的实施

C.新经济的出现

D.第一次工业革命的发生

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第9题

DMD的诊断依据是（）

A.X性连锁隐性遗传，女性为致病遗传基因携带者（gene carrier），所生的男孩50%发病

B.通常3-5岁隐袭起病，突出症状为骨盆带肌肉无力，有典型的"鸭步"和翻身起立的"Gower"征

C.90%的患者有肌肉假性肥大，以腓肠肌最明显

D.多数患者伴有心肌损害

E.病程进展快，一般12岁以上即有生活不能自理，需坐轮椅，最后并发肺部感染、心力衰竭

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第10题

听力原文：There are two primary ways that genes can be used to treat disease. The first is

gene therapy, in which one or more genes are injected into the patient to replace those that are absent or not working properly. This approach has been used to treat heart disease and many forms of cancer. The second way to exploit genes to treat disease is known as small-molecule therapy. In this approach, a small-molecule (that is a drug) is given to the patient to modify the function of one or more genes in the body.

According to the speaker, small-molecule therapy can be used to ______.

A．replace genes not functioning properly in the body

B．increase the number of genes working properly in the body

C．modify the function of some genes in the body

D．replace genes absent in the body

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第11题

The author's tone in this passage is ______.A．sympatheticB．doubtfulC．criticalD．objective

The author's tone in this passage is ______.

A．sympathetic

B．doubtful

C．critical