首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
It was 10 years ago, on a warm July night, that a newborn lamb took her first breath in a small shed in Scotland. From the outsi
It was 10 years ago, on a warm July night, that a newborn lamb took her first breath in a small shed in Scotland. From the outsi
admin
2015-03-13
26
问题
It was 10 years ago, on a warm July night, that a newborn lamb took her first breath in a small shed in Scotland. From the outside, she looked no different from thousands of other sheep born on【C1】______farms. But Dolly, as the world soon came to realize, was no【C2】______lamb. She was cloned from a single cell of an adult female sheep,【C3】______long-held scientific dogma that had declared such a thing biologically impossible.
A decade later, scientists are starting to come to grips with just how different Dolly was. Dozens of animals have been cloned since that first lamb—mice, cats, cows and, most recently, a dog—and it’s becoming【C4】______clear that they are all, in one way or another, defective.
It’s【C5】______to think of clones as perfect carbon copies of the original. It turns out, though, that there are various degrees of genetic【C6】______. That may come as a shock to people who have paid thousands of dollars to clone a pet cat only to discover that the baby cat looks and behaves【C7】______like their beloved pet—with a different-color coat of fur, perhaps, or a【C8】______different attitude toward its human hosts.
And these art just the obvious differences. Not only are clones【C9】______from the original template(模板)by time, but they are also the product of an unnatural molecular mechanism that turns out not to be very good at making【C10】_______ copies. In fact, the process can embed small flaws in the genes of clones that scientists are only now discovering.
A)abstract I)nothing
B)completely J)ordinary
C)deserted K)overturning
D)duplication L)separated
E)everything M)surrounding
F)identical N)systematicaly
G)increasingly O)tempting
H)miniature
【C6】
选项
答案
D
解析
空格处位于genetic后面,故应填入名词。该句意思是:基因复制的准确程度千差万别,能够被genetic修饰的名词应该是比较专业的,且跟基因有关,故duplication最为合适。再者,选项中只有一个名词,故也可确认答案为D)。
转载请注明原文地址:https://kaotiyun.com/show/j0h7777K
0
大学英语六级
相关试题推荐
A、Readinganarticleaboutendangeredanimals.B、Preparingforhispapers.C、Raisingfundsforsavingtheendangeredanimals.D、
[A]Filmschoolsandfilmdirectingschoolsprovideaspiringfilmstudentswithasolidunderstandingofthemanyfacetsofthef
Angerisaverycommonhuman【C1】______andatsometimeoranotherweallexperienceit.Fromyoungchildrentooldpeopleweall
A、Sam’skneeshouldbebetterbynow.B、Thisisn’tagoodtimeforSamtoquit.C、ThenewsaboutSamisquiteasurprise.D、Sam
Biologically,thereisonlyonequalitywhichdistinguishesusfromanimals:theabilitytolaugh.Inauniversewhichappearst
A、Harmtosingersdonebysmokyatmospheres.B、Sideeffectsofsomecommondrugs.C、Voiceproblemsamongpopsingers.D、Hardship
HowCustomsWorkA)Oneofthelittleritualsallinternationaltravelersgothroughiscustoms.Tomostpeople,thisisjustano
A、Hecan’tfindanidealdate.B、Heistoocommonaperson.C、Hehasfailedtorealisehisdreams.D、HeisdeceivedbyMrs.Righ
A、Itshouldberaisedbysoldiers.B、Itshouldberaisedquicklybyhand.C、ItshouldberaisedonlybyAmericans.D、Itshouldb
A、Hecaughtcold.B、Heaterottenfood.C、Hebreathedinharmfulchemicalvapours.D、Hefellfromhisbicycle.C推断题。根据题干中的theca
随机试题
A.升麻B.柴胡C.二者皆有D.二者皆无(1999年第111,112题)玉女煎的绀成药物中含有()
某公司向市场投放一种新产品,在试销售阶段,发现销路不畅,遂对现行环境做了客观分析,并对原产品投放方案进行了改进,该公司采用的决策是【】
设随机变量X~B(3,0.3),且P{X=2}=()
男性,24岁,口腔溃疡反复发作5年,加重3个月。检查:舌缘左右侧,各可见两块约1.0~1.2cm大小的溃疡,边缘不整,表面有灰白色的膜,下唇内侧粘膜有条形白色瘢痕,可能的诊断是
受益人是人身保险合同中享有保险金请求权的人。有权指定人身保险合同受益人的人是( )。
危机现场处理的内容不包括()。
下列经济业务中,属于因经营活动而引起的现金流入有()。
20世纪后期,陕西凤雏村出土了刻有“凤"字的甲骨四片,这些“凤”字的形体大致相同,均为头上带有象征神权或王权的抽象化了的毛角的短尾鸟。东汉许慎《说文解字》云:“鸑鷟,凤属,神鸟也。……江中有鸑鷟,似凫而大,赤目。”据此,古代传说中鸣于岐山、兆示周王朝兴起的
设二次型f(x1,x2,x3)=5x12+ax22+3x32一2x1x2+6x1x3一6x2x3的矩阵合同于用正交变换法化二次型/(x1,x2,x3)为标准形.
在FastEthernet中,为了使物理层在实现100Mbps速率时所使用的传输介质和信号编码方式的变化不会影响MAC子层,100BASE-T标准定义了______。
最新回复
(
0
)