首页
登录
职称英语
Today nanotechnology(纳米技术)is still in a formative phase. Yet it is maturing
Today nanotechnology(纳米技术)is still in a formative phase. Yet it is maturing
游客
2023-08-20
49
管理
问题
Today nanotechnology(纳米技术)is still in a formative phase. Yet it is maturing rapidly. Between 1997 and 2005, investment in nanotech research and development by governments around the world【C1】______from $ 432 million to about $4.1 billion, and corresponding industry investment exceeded that of governments by 2005. By 2015 , products incorporating nanotech will contribute approximately $ 1 trillion to the global economy.
Descriptions of nanotech typically characterize it purely in terms of the minute size—assemblies between the size of an atom and about 100 molecular diameters(分子直径). That【C2】______makes it sound as though nanotech is merely looking to use infinitely smaller parts than conventional engineering. But rearranging the atoms and molecules leads to new【C3】______One sees a transition between the fixed behavior of individual atoms and molecules and the adjustable behavior of collectives. Thus, nanotechnology might better be viewed as the【C4】______of quantum theory(量子论)and other nano-specific phenomena to fundamentally control the properties and behavior of matter.
The second stage, which began in 2005, focuses on active nanostructures that change their size, shape, conductivity or other properties during use. New drug-delivery particles could release therapeutic(治疗的)molecules in the body only after they reached their【C5】______diseased tissues. Electronic components such as transistors and amplifiers with adaptive functions could be reduced to single, complex molecules.
Starting around 2010, workers will【C6】______expertise with systems of nanostructures, directing large numbers of intricate components to specified ends. One application could involve the guided self-assembly of nanoelectronic components into three-dimensional circuits and whole devices. Medicine could employ such systems to improve the tissue compatibility of implants, or perhaps even to build【C7】______organs.
After 2015-2020, the field will include molecular nanosystems. Whereas biological systems are water-based and markedly temperature-sensitive, these molecular nanosystems will be able to operate in a far wider range of environments and should be much faster. Computers and robots could be reduced to【C8】______small sizes. New interfaces linking people directly to electronics could change telecommunications.
Over time, therefore, nanotechnology should benefit every industrial sector and health care field. Nanotech does, however, pose new challenges to risk governance as well. Internationally, more needs to be done to collect the scientific information needed to resolve the【C9】______and to install the proper regulatory oversight. Helping the public to【C10】______nanotech soberly in a big picture that retains human values and quality of life will also be essential for this powerful new discipline to live up to its astonishing potential.
A)ingenious I)cultivate
B)properties J)targeted G)ambiguities K)perceive
D)soared L)depiction
E)extraordinarily M)illuminate
F)artificial N)compulsory
G)indignation O)application
H)instantaneously [br] 【C5】
选项
答案
J
解析
结合句意:只有当新型送药粒子到达——疾病组织的时候,才能在身体中释放治疗分子。这些疾病组织应该就是要治疗的目标,故J)targeted“目标的,定向的”为答案。
转载请注明原文地址:http://tihaiku.com/zcyy/2943241.html
相关试题推荐
Todaynanotechnology(纳米技术)isstillinaformativephase.Yetitismaturing
Todaynanotechnology(纳米技术)isstillinaformativephase.Yetitismaturing
Todaynanotechnology(纳米技术)isstillinaformativephase.Yetitismaturing
Todaynanotechnology(纳米技术)isstillinaformativephase.Yetitismaturing
Todaynanotechnology(纳米技术)isstillinaformativephase.Yetitismaturing
Todaynanotechnology(纳米技术)isstillinaformativephase.Yetitismaturing
Todaynanotechnology(纳米技术)isstillinaformativephase.Yetitismaturing
Todaynanotechnology(纳米技术)isstillinaformativephase.Yetitismaturing
Todaynanotechnology(纳米技术)isstillinaformativephase.Yetitismaturing
Todaynanotechnology(纳米技术)isstillinaformativephase.Yetitismaturing
随机试题
Mostofustellonetwoliesaday,accordingtoscientistswhostudythese
Whatheis______isneithermoneynorfame,butthesatisfactionofseeinghisst
InternationalDiningEtiquette1.AsiaRulesofusingchopsticksRestthemo
Mostpeoplefeeltheneedtomakesureeveryoneinagroupiscomfortablebe
调制要求m0+m(t)≥0,否则,经过调制,包络失真.()
算数表达式a*(b+c/d)-e的后缀式为( )。A.abcd/+*e-
下列不属于结合型药物特点的是A.不呈现药理活性 B.不能通过血管壁 C.不能
某学院共有42名员工,他们或者教学科研工作,或者做行政工作。在该学院中,教授都不
下面关于成本加成定价模型的叙述,错误的是()。A.贷款价格=资金成本+贷款费用
信托产品因为缺乏转让的平台而具有的风险称作()。A.流动性风险 B.信托公
最新回复
(
0
)