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
专升本
Wind, wave and tides all suffer from the fact that they are variable sources of power output. For example, there will be times w
Wind, wave and tides all suffer from the fact that they are variable sources of power output. For example, there will be times w
admin
2009-08-21
98
问题
Wind, wave and tides all suffer from the fact that they are variable sources of power output. For example, there will be times when due to windless days or calm seas—and both can occur for periods of several days even in the winter time—they are producing little or no power.
Insofar as this shortfall has to be made up by electricity from conventional power stations, these newer energy sources would not necessarily reduce the installed capacity of such conventional stations needed to meet the total demand on windless or calm days. What the newer sources will do is to save fuel that would otherwise be burned in conventional power stations.
Pumped storage reservoirs could in principle be used to counter this effect, but there 1 is not enough additional reservoir capacity available. We therefore face the same type of storage problem as in solar energy. Thus, unless some new method of energy storage can be developed or we move to the widespread use of a fuel like hydrogen, the wind and wave schemes will be at an economic disadvantage.
选项
A、is not as consistent as it should be
B、is generally less in winter than in summer
C、is never likely to be very great
D、is consistent
答案
A
解析
细节题。根据文章首句中的“variable sources”,A选项与之意思相当。
转载请注明原文地址:https://kaotiyun.com/show/hYSC777K
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
什么是认识过程的第二次飞跃?这次飞跃的重要性和实现条件是什么?
我国的人民民主专政是具有中国特色的无产阶级专政。我国的人民民主专政的突出优点是()。
海峡两岸旅游交流协会2019年7月31日在文化和旅游部官方网站发布公告表示,鉴于当前两岸关系,决定暂停47个城市大陆居民赴台个人游试点,起始日期为2019年()。
Accordingtothepassage,thecomingofonlinejobsearchingbrings______.Itcanbeinferredthat"screeningsoftware"inPar
Accordingtotheauthor,reallygoodscience______.Itcanbeinferredfromthepassagethatscientistsofthe18thcentury__
据说这幅画是毕加索(Picasso)的名作。
Socialforcesthatprevailedinthecountryafter1890furtherinfluencedtheirdevelopment.
Whenafire______attheNationalExhibitioninLondon,atleasttenpricelesspaintingswerecompletelydestroyed.
Ifanybodycalls,tellthemI’mout,andaskthemto______theirnameandaddress.
随机试题
促销就是促进销售的简称。()
与肺通气弹性阻力有关的是与肺通气非弹性阻力有关的是
4岁患儿,发热、头痛、皮疹12小时,频繁抽搐、昏迷2小时。查体:全身可见多数瘀点、瘀斑,两下肢有融合成片的紫癜,血压测不出,瞳孔右侧扩大,光反应消失。在流脑发病机制中起主要作用的的物质是
关于荚膜的叙述,正确的是
育田医院为招徕顾客,谎称本院有全国著名的容康医院整形专家坐诊,患者小圆慕名而来,并与育田医院签订医疗整形合同。育田医院在为小圆实施隆鼻手术时,因操作不当致其面部感染,治愈后留下较大疤痕。相关肖事人诉诸法院,主张精神损害赔偿。法院受理该案后,小圆因突发心梗猝
《安全生产许可证条例》是根据()的有关规定制定的。
本单位会计科目需要进行如下修改:
邓小平南巡讲话的背景、内容和意义。
Mostofthemhadvisitedtheinvalidoftenduringthepastfewmonths,marvelingathis______spiritandhisunfailinggoodtem
Whatisthestudent’sproblem?
最新回复
(
0
)