首页
财务会计
医药卫生
金融经济
考公考编
外语考试
学历提升
职称考试
建筑工程
IT考试
其他
登录
财务会计
共用题干 California Gives Green Light to Sp
共用题干 California Gives Green Light to Sp
Loveyou
2019-12-17
37
问题
共用题干California Gives Green Light to Space Solar Power
Energy beamed down from space is one step closer to reality,now that California has given the green
light to an agreement that would see the Pacific Gas and Electric Company buy 200 megawatts(兆瓦)of power
beamed down from solar-power satellites beginning in 2016.But some major challenges will have to be
overcome if the technology is to be used widely.
A start-up company called Solaren is designing the satellites,which it says will use radio waves to beam
energy down to a receiving station on Earth.
The attraction of collecting solar power in space is the almost uninterrupted sunshine available in geo-
synchronous(与地球同步的)orbit. Earth-based solar cells , by contrast , can only collect sun light during day-
time and when skies are clear.
But space-based solar power must grapple(努力克服)with the high cost per kilogram of launching things in-
to space,says Richard Schwartz of Purdue University in West Lafayette,Indiana."if you're talking about it being
economically viable for power of the Earth,it's a tough go,"he says.
Cal Boerman,Solaren's director of energy services,says the company designed its satellites with a view
to keeping launch costs down."We knew we had to come up with a different,revolutionary design,"he says.
A patent the company has won describes ways to reduce the system's weight,including using inflatable mir-
rors to focus sunlight on solar cells,so a smaller number can collect the same amount of energy.
But using mirrors introduces other challenges,including keeping the solar cells from overheating,says
Schwartz."You have to take care of heat dissipation(散发)because you're now concentrating a lot of energy
in one place,"he says.According to the company's patent,Solaren's solar cells will be connected to radia-
tors to help keep them cool.
Though Boerman says the company believes it can make space-based solar power work,it is not expec-
ting to crowd out other forms of renewable energy.Laws in California and other states require increasing use
of renewable energy in coming years,he points out."To meet those needs,we're going to need all types of
renewable energy sources,"he says.
选项
Solar-power satellites will use radio waves to beam energy down from space.A:RightB:WrongC:Not mentioned
答案
A
解析
根据短文第二段可知,太阳能卫星会使用无线电波将能源发送到地球上的接收站。 短文在第一段中讲太平洋天然气和电力公司将购买200兆瓦的从太阳能电站的卫星上 发送来的电力时提到了200这个数字。 短文在第三段末尾提到:地球上的太阳能电池只能在白天且无云的时候收集阳光。 根据短文第四段可知,在太空的太阳能工厂必须努力克服的问题是:向太空每发射一 千克的物品都要付出高昂代价,即成本高的问题。 根据短文第五段的最后一句可知答案。 根据短文最后一段可知,从太空中获得的太阳能并不会挤掉其他形式的可再生能源。 短文主要围绕美国,尤其是加州来说,并没有提到其他国家的情况。
转载请注明原文地址:https://ti.zuoweng.com/ti/aaOfKKKQ
相关试题推荐
B解题指导:题干图形的笔画数分别为4、5、6、7笔,所以应选择比划数为8笔的图形。故答案为B。
共用题干 某事业单位与某期货公司签订期货经纪合同,委托期货公司进行期货交易,该
共用题干 A期货公司准备从事投资咨询业务,在准备提交的申请材料中,准备了期货投
共用题干 XYZ股票50美元时,某交者认为该股票有上涨潜力,便以3.5美元的价
共用题干 XYZ股票50美元时,某交易者认为该股票有上涨潜力,便以3.5美元的
共用题干 华天公司为上市公司,适用企业所得税税率25%,所得税采用资产负债表债
共用题干甲、乙两公司属同一集团,甲公司为上市公司,2010~2012年发生的与
共用题干甲、乙两公司属同一集团,甲公司为上市公司,2010~2012年发生的与
共用题干甲、乙两公司属同一集团,甲公司为上市公司,2010~2012年发生的与
共用题干甲公司和乙公司均为增值税一般纳税人,适用的增值税税率均为17%。甲公司
随机试题
中、老年人膳食脂肪酸中亚油酸应占总能量的 A.5% B.6% C.3%
患者,男,42岁,过敏体质,C67D67缺失,余牙正常。医师设计C5D5RPI卡
以下属于细菌的特殊结构的是 A、质粒 B、细胞核 C、菌毛 D、细
根据《中华人民共和国环境噪声污染防治法》,关于交通运输噪声污染防治有关规定的说法
在下列混凝土的技术性能中,正确的是( )。
圈梁必须是封闭的,当砌体房屋的圈梁被门窗洞口截断时,应在洞口上部增设相同截面的附加圈梁,附加圈梁与原圈梁的搭接长度不应小于其垂直距离的多少倍(且不得小于1...
CCBII合并了许多()功能,如果发生故障,CCBII具有独特的识别、重新配置、备份主要部件的能力。
()是对经济活动和经济交往中书立、领受、使用的应税经济凭证所征收的一种税。A.营业税B.印花税C.个人所得税D.增值税
根据《中华人民共和国药品管理法》,应按劣药论处的药品包括A.未标明有效期或者更改有效期的药品B.不注明或者更改生产批号的药品C.擅自添加了防腐剂的药品D.
关于公开招标与邀请招标区别的说法,正确的是()。A:招标人不同B:投标人数量不同C:发布招标信息的方式不同D:发布招标信息的单位不同