更多“新（改）建电气化铁路工程项目，供电远动系统必须坚持使用的原则”相关的问题
The same one word may have more than one meaning. This is what we call ______.
A．synonymy
B．homonymy
C．polysemy
D．antonymy
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II 型集中器中5、6端子代表含义为（）。
A.遥信
B.RS485I
C.抄表维护
D.RS485I I
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下列结构中，具有维持眼内压作用的是（）。
A.玻璃体
B.晶状体
C.房水
D.巩膜
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电缆线路在运行中因绝缘击穿、导线烧断等突发情况或在预防性试验时发生绝缘击穿而迫使电缆线路停止供电的现象称为电缆线路故障。
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It was just a footnote compared with the more infectious disaster that killed millions more people in 1918, but the 1957 influenza pandemic that sickened some 25 to 30 percent of the American population was a medical watershed for the clues that it offered about how a new strain of influenza could spread. Americans first got a whiff of the so-called Asian flu when Maurice Hilleman, aphysician at Walter Reed Hospital in Washington, D.C., read about an unusually large number of people-some 250,000—who had come down with flu-like symptoms in Hong Kong. Concerned, he immediately requested samples from American servicemen in Asia and within days had his answer. The genetic structure of this strain was like nothing immunologists had ever seen before. When the virus finally hit America: "It went like a house on fire," recallsD.A Henderson, then the chief of the United States Epidemic Intelligence Service. Worsened by school openings that fall, the flu spread so rapidly from a few counties in Louisiana that just eight weeks later it had heavily infected more than half the counties in nearly all 50 states. Although it wasn"t particularly potent, the 1957 strain killed about 80,000 Americans. The victims were predominantly the very old and the very young, although the infection occasionally killed otherwise healthy adults as well. Pharmaceutical companies worked furiously to produce a vaccine, ultimately distributing some 40 million doses. But "they were just a little bit too late," says Arnold Monto, an influenza specialist at the University of Michigan. "They only had significant doses available when the pandemic was peaking." Earlier, scarcities raised questions about who deserved the vaccine first.A set of official rules gave priority to military personnel and necessary civic workers, but that didn"t stop members of the San Francisco 49ers football team from getting vaccinated before police and firemen. Despite some manufacturing improvements, experts say the same shortages could occur with a pandemic today. And that concern has caused preparedness officials to plan for community interventions such as school closings and isolation of sick people. But Henderson says, "It won"t work. And you don"t need a better example than "57. When you go from just a few scattered outbreaks in the end of August to the whole country infected in eight weeks, at a time when people didn"t travel as much as they do today and cities were not as densely populated, what do you think we"re going to see today" Better, he says, to have good vaccines and to ensure that the medical system can handle the extra load.
A．the production of the vaccine was timely and successfulB．there were enough vaccines before the influenza peakedC．not all people got equal chance to get vaccinatedD．none of any football team members got vaccinated
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我们通过（）命令可以知道信息从你的计算机到互联网另一端的主机是走的什么路径。
A . A.route
B . B.traceroute
C . C.ping
D . D.net
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识别LDL受体的是（）。
A . apoAⅡ
B . apoAⅠ
C . apoE
D . apoCⅡ
E . apoB48
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儿童社会工作者在直接面向儿童提供服务时，有时需要重构和代偿给儿童的先天需要是（）。
A . 爱的需要
B . 学习的需要
C . 生存的需要
D . 游戏的需要
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高级人民法院和最高人民法院审理第一审案件时由审判员5-7人或者由审判员和人民陪审员5-7人组成合议庭进行。()
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被淋湿的烟花爆竹药物应（）。
A.堆放 B.摊开放置 C.放置在封闭室内
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劳动防护用品和矿山安全仪器仪表的______及劳动防护用品的设计、生产、检验、包装、储存、运输和使用的安全要求由国家安全生产监督管理总局负责制定。
A.品种
B.规格
C.质量
D.等级
E.数量
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靠密闭容腔容积变化进行能量转换的泵称为（）
A.叶片式泵
B.电磁泵
C.喷射泵
D.容积式泵
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有形状或位置公差要求的零件的被测要素,在图样上必须标明基准要素
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稀释浓硫酸时,应在烧杯等耐热的容器中进行,在玻璃棒的不断搅拌下,缓慢地将水加到浓硫酸中,不能相反操作。
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