单选题
发布日期:2021-03-22
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接触网是在电气化铁道中,沿钢轨上空“之”字形架设的,供受电弓取流的高压输电线。接触网是铁路电气化工程的主构架,是沿铁路线上空架设的向电力机车供电的特殊形式的输电线路。其由接触悬挂、支持装置、定位装置、支柱与基础几部分组成。
更换,汉语词语,拼音是gēng huàn,意思是调换;替换。
[元]字止善,句章(今浙江宁波南)人。工篆,尝作篆隶偏傍点画辨行於世。《书史会要》
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The Great Depression spread from the US to the rest of the capitalist world, yet it affected the Americans the most. It gave (1)____ to the fear that such catastrophes would (2)____(occur) or even that the American economy would live in a (3) s____ of permanent depression unless radical changes were (4) m____ in the economic system. The fear is now gone, partly because that analysis was judged faulty. Changes in institutions and policies that (5) sta____ the economy also helped to dispel those fears. People's worry (6) per____ about the possibility of less severe, but still debilitating (使虚弱), recessions, (7)____ . But the experience of the postwar years has provided two lessons: First, the only serious recessions in which US unemployment rose to highs of 9 percent and 11 percent (8) re____, came after fairly high inflation. Second, even recessions of that depth later on (9) t____ out to be less painful than had been expected because they were short. This was because the (10) ____ American worker had substantial assets, and was likely to be in a family with more than one worker.
构造物回填应分层填筑,每层压实厚度不宜超过()cm,压实度应按相关规范和设计要求进行检测,当设计无要求时,应与路基顶面压实标准一致。
影响微生物在食品中生长的因素包括()
涉密场所使用进口设备和产品的应当进行安全保密技术检测。
()的计算值为负数时,说明需向颞侧移心。
有机物在筛管中随液流的流动而流动,而这种液流流动的动力,则来自于输导系统两端的()。
所有的记账凭证,都要有出纳人签章。( )
区域活动的教育功能是通过()来实现的。
若完成1m3墙体砌筑工作的基本工时为0.5工日,辅助工作时间占工序时间的4%,准备与结束工作时间.不可避免的中断时间.休息时间分别占工作时间的6%.3%和12%,该工程时间定额为()工日/m3
经过2011车市______的理性洗礼后,中国车市开始由狂热激进逐渐转向成熟稳健,在整体车市呈现出的一片淡定与平和背后,城市SUV这一细分市场却是“万绿丛中一点红”,给有些______的车市保留了最后一份狂热。依次填入划横线部分最恰当的一项是( )。
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