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
The exploitation of the power in the Sun’s rays is a form of alternative energy now showing new commercial promise. In the
The exploitation of the power in the Sun’s rays is a form of alternative energy now showing new commercial promise. In the
admin
2010-04-24
50
问题
The exploitation of the power in the Sun’s rays is a form of alternative energy now showing new commercial promise.
In the US, manufacturers have made important 【C1】______ in the development of the technology to bring down the cost of solar conversion systems 【C2】______ improving their reliability.
The direct conversion of solar 【C3】______ electrical energy, using photovoltaic cells 【C4】______ distinct advantages as an alternative energy option.
【C5】______ other forms of renewable energy, photovoltaic is based on modular solid state devices which can be mass 【C6】______ at a relatively low cost.
Here wafers of silicon—not dissimilar 【C7】______ ones which are turned into silicon chips— 【C8】______ an electric current when light falls upon them.
When built into panels or modules where each cell interconnects, the amount of electricity generated can be large enough to 【C9】______ a home or even a community.
Over the past 10 years, 【C10】______ extensive research and substantial Government and private industry funding, the price of photovoltaic modules has dropped 【C11】______ .
【C12】______ in 1973-74 the price per peak watt was between US $100 and $150, commercial prices for small array system now vary between $6.50 and $7 per watt.
This rapid price reduction has been accompanied by a 400 per cent jump in the 【C13】______ efficiency of photovoltaic modules.
【C14】______ solar cells are poor converters of sunlight to electricity. Early cells could only manage to mm about five per cent of the incident rays into electricity, but recent development have increased 【C15】______ to more than 10 percent.
【C2】
选项
A、while
B、if
C、of
D、for
答案
A
解析
此处意为“在提高可靠性的同时,降低太阳能转化系统的成本”。
转载请注明原文地址:https://kaotiyun.com/show/T79K777K
0
专业英语四级
相关试题推荐
Brazil’senergyministersaysthecountryisonthevergeofanenergycrisisthat_________.
DAYTRIPSEvenifyouareonlygoingonadaytriptoanothercountry,accidentscanhappen.Sopleasemakesureyouhaveadeq
Peoplethinkingabouttheoriginoflanguageforthefirsttimeusuallyarriveattheconclusionthatitdevelopedgradually
Thetranslatormusthaveanexcellent,up-to-dateknowledgeofhissourcelanguages,fullfacilityinthehandlingofhistarget
Thethemeofthenovelisthataperson’sfate________thatofthewholecountry.
ScientistshavelongbelievedonewaytostoptheEarth’satmospherefromwarmingisbyplantingmoretrees.Theideaisthatmo
Inordertobeagoodscientist,________.
WhathappenedthisFriday?
Itishardtotrackthebluewhale,theocean’slargestcreature,whichhasalmostbeenkilledoffbycommercialwhalingandis
Pleasetellmespecificallywhatresponsibilitiesthenewjob______withit.
随机试题
______hewasaregularcustomer,thebossallowed10%discountoffthepricesofthegoods.
系统性红斑狼疮(SLE)的发病与下列哪项无关()。
十进制数254转换为二进制数是()。
背景资料:某大桥主桥为四跨的预应力混凝土连续箱梁桥,最大跨径120m,主桥墩柱高度为16~25m,各梁段高度为2.7~5.6m。主桥0号块、1号块梁段采用搭设托架浇筑施工,其余梁段采用菱形桁架式挂篮按“T”形对称悬臂浇筑。事件1:施工单位
劳动者在就业岗位之间的变换所形成的失业称为()。
在期中复习时,小张采用列提纲、画网络关系图和列表格等方法来帮助自己记忆课文内容。她所采用的这种学习策略属于()。
(山东2012—63)-1,2,0,4,4,12,()
瀑布模型是最常用的传统软件开发模型。它的特点之一是(1)。根据国家标准GB 8566-88《计算机软件开发规范》的规定,软件开发流程分为8个阶段,即可行性研究和计划、需求分析、概要设计、详细设计、实现、组装测试、确认测试、使用和维护。实现阶段要完成的工作之
【S1】【S6】
Hecouldn’tanswera______questioncorrectly,nottomentionpassingtheexamination.
最新回复
(
0
)