| 图中所示为四种常用电子调节器的过渡过程特性曲线图。 图中Uk为调节器输入，Uc为调节器输出。题中R0、R 1和C 1分别为电子调节器线路中的电阻和电容。 |
| If we view a science as a body of
systematized knowledge, then chemistry is usually called a natural science
because it{{U}} (26) {{/U}}knowledge of the natural world. At times we
may wonder{{U}} (27) {{/U}}there is no complete system{{U}} (28)
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(30) {{/U}}all of its facts, laws, and theories. {{U}} (31)
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today, and its future holds the bright promise{{U}} (33) {{/U}}much more
to come. Man’s knowledge about himself and nature has grown into{{U}} (34) {{/U}}sciences. The growth of the separate sciences has been more developmental than intentional. The separation of the natural sciences into physical and biological sc A. quantities B. substance C. qualification D. properties [单选题]设在警冲标内方的钢轨绝缘距警冲标不得小于（）m。
A.3 B.3.5 C.4 D.4.5 [单选题]每节车的辅助逆变器处于（ ）工作状态，这样即使只有一只受电弓工作，所有辅助逆变器都能正常工作。
A.串联 B.并联 C.串并联 D.并网 [多选题]在进行全部停电作业和邻近带电的作业时，必须完成下列哪些安全措施：( )
A.停电； B.检电； C.接地封线； D.悬挂标示牌及装设防护物。 [多选题]专项能力考核( )有着重要的意义。
A.为解决农村富余劳动力转移 B.下岗失业人员再就业 C.大学生就业 D.大学生创业 [名词解释]劳动时间
[单项选择]This passage mainly discusses ______.
A. the problem of different opinions B. the argument among three people C. why different people perceive totally different things about the same scene D. how to solve the problems of the people when they have different opinions [单选题]高锰钢整铸辙叉心宽40mm断面处，辙叉心垂直磨耗（不含翼轨加高部分），60kg/m及以上钢轨在到发线上超过（）时应及时更换。
A.6mm B.8mm C.10mm D.12mm [判断题]‐年，人民币鉴别仪通用技术条件GB16999-2010国家强制标准正式发布。
A.正确 B.错误 [单选题]肋间内肌（ ）
A.提肋助吸气的肌 B.降肋助呼气的肌 C.起自下6对肋和肋软骨 D.起自下8个肋外面 E.参与构成腹股沟镰 [单选题]倒闸操作前不核对设备、违规跳项、漏项操作，或擅自解锁操作。属于（ ）违章。
A.闯红线 B.特别严重 C.严重 D.一般 [多项选择]下列各项中，属于股份有限公司申请股票上市，应当符合的条件有( )。
A. 股票经国务院证券监督管理机构核准已公开发行 B. 公司股本总额不少于人民币5 000方元 C. 公开发行的股份达到公司股份总数的25%以上；公司股本总额超过人民币4亿元的，公开发行股份的比例为10%以上 D. 公司最近3年无重大违法行为，财务会计报告无虚假记载 我来回答: 提交
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