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
Although the fact that today viruses are known to 【S1】______ cause cancer in animals and in certain plants, tha
Although the fact that today viruses are known to 【S1】______ cause cancer in animals and in certain plants, tha
admin
2010-05-09
47
问题
Although the fact that today viruses are known to 【S1】______
cause cancer in animals and in certain plants, that exists 【S2】______
a great reluctance to accept viruses as being of importance
in human cancer.
Basic biological phenomena generally do not
differ strikingly as one goes from one species through 【S3】______
another. It should be recognize that caner is a biological 【S4】______
problem and not a problem that is unique for man.
Cancer originates when a normal cell suddenly becomes
a cancer cell which multiplys widely and without 【S5】______
apparent restraint. Cancer may originate in many different
kind of cell, but the cancer cell usually continues 【S6】______
to carry certain traits of the cell of origin. The
transformation of a normal cell into a cancer cell may have
less than one kind of cause, but there is good reason to 【S7】______
consider the relationships that exist between viruses
and cancer.
Since there is no evidence which human cancer, as 【S8】______
generally experience, is infectious, many persons
believe that because viruses are infectious agents they
cannot possibly be of importance in human cancer.
However, viruses can mutate and examples are known
in which a virus that never kills its host can mutate to
form a new strain of virus that always kills its host. It
does not seem unreasonable assume that an innocuous 【S9】______
latent virus might mutate to form a strain that causes
cancer. Certainly the experiment evidence now available 【S10】______
is consistent with the idea that viruses as we know
them today, could be the causative agents of most, if not
all cancer, including cancer in man.
【S9】
选项
答案
∧ assume→to
解析
动词不定式小品词to缺失。it在句中是形式主语,真正的主语是后面的动词不定式 to assume that an innocuous latent virus might mutate to form a strain that causes cancer,因此,assume前面加上“to”。
转载请注明原文地址:https://kaotiyun.com/show/dbKK777K
0
大学英语六级
相关试题推荐
Whattopicisthepassagemainlyconcernedwith?Theotherhigheranimalsfailtouselanguageasmandoesbecause______.
A、Tosavespace.B、Tohelptheplantsgrowhealthily.C、Tomakeplantsyieldmorefruits.D、Towatertheplantseasily.AWhatis
A、PeoplewholiveinAmazontribesdon’tthinkplantsarethebasisofthefoodpyramid,B、PeoplewholiveinAmazontribesdon’
Britain’sdependencyoncertainessentialserviceshasgreatlywidenedandbecomeakeyroleinthecountry’s______.Unionwo
Anindustrialsociety,especiallyoneascentralizedandconcentratedasthatofBritain,isheavilydependentoncertainessent
Inthepast,theglobalaveragetemperaturemayhavebeen27℃.Toresolveremaininguncertainties,it’snecessarytoobservefa
A、Applyimmediatelywithanycreditcard.B、Filloutthemembershipapplicationform.C、Payamembershipfee.D、Buycertainitem
Hereamidthesteelandconcretecanyons,greengrassgrows.Ahawthorntree(山楂树)standsinnewsoil,andfreshlydugplantsbe
Accordingtothepassage,colorblindnesscanbedangerousincertainoccupationslike______.Accordingtothepassage,insect
随机试题
输卵管造影术
《论语》由________的弟子及再传弟子汇辑整理而成,成书于战国初年。
维生素K的作用机制是
为避免抵押合同无效造成贷款风险,银行抵押贷款首先要做好(),才能真正保证贷款抵押的安全性。
可供出售金融资产期末按公允价值计量,不涉及期末计提减值准备的问题。()
花旗银行迄今已有近200年的历史。进入21世纪,花旗集团的资产规模已达9022亿美元,一级资本545亿美元,被誉为金融界的至尊。时至今日,花旗银行已在世界100多个国家和地区建立了4000多个分支机构,在非洲、中东,花旗银行更是外资银行抢滩的先锋。花旗的骄
()认为,人的情绪并不是由某一诱发事件本身引起,而是由个体对事件的认知、解释和评价所引起,这一理论又被称为ABC理论。
商业银行不动用本身资金,为顾客提供的各类服务的业务是()。
下列叙述中正确的是()。
有下列二叉树,对此二叉树前序遍历的结果为( )。
最新回复
(
0
)