Modem technology and science have
produced a wealth of new materials and new ways of using old materials. For the
artist this means wider opportunities. There is no doubt that the limitations of
materials and nature of tools both restrict and shape a man’s work. Observe how
the development of plastics and light metals along with new methods of welding
has changed the direction of sculpture. Transparent plastic materials allow one
to look through an object, to see its various sides superimposed on each other
(as in Cubism or in an X-ray). Today, welding is as prevalent as casting was in
the past. This new method encourages open designs, where surrounding and
intervening space becomes as important as form itself. More ambiguous than other scientific inventions familiar to modem artists, but no less influential, are the psychoanaly A. They diminished all time barriers and moral judgments to combine disconnected dream experiences. B. They tried to express their subconscious world. C. They could transform real existence into incoherent dreams. D. They wanted to substitute direct expressions for fragmented images. [多选题]交流电路中,功率因数等于( )。
A.电压与电流的相位角差的正弦 B.电压与电流的相位角差的余弦 C.有功功率与视在功率的比值 D.无功功率与视在功率的比值 [单选题]500kV线路验电时,人体与被验电设备最小安全距离为( )m,并设专人监护。
A.3 B.4 C.5 D.6 [单选题]在有接触网的于同同时更换两股钢轨上夹板应须事先通知( )采取安全方准开始作业。
A.工务部门 B.电务部门 C.供电部门 D.车务部门 [单选题]缓冲间是进行呼吸道传染病诊治的病区中清洁区与潜在污染区之间、潜在污染区与污染区之间设立的两侧均有门的小室,为医务人员的( )。
A.更衣间 B.准备间 C.工作间 D.洗澡间 [判断题]混凝土中的水泥用量越大,其质量就越好。
[判断题]轴承盖和轴承相互摩擦是造成离心泵轴承温度高的原因之一。
A.正确 B.错误 [多选题] 《特种设备安全法》规定,特种设备生产、经营、使用单位应当按照国家有关规定配备特种设备(),并对其进行必要的安全教育和技能培训。
A. 安全管理人员 B. 作业人员 C. 检验人员 D. 检测人员 E. 营销人员 [多项选择]不伴反常呼吸的单根或多根单处肋骨骨折的处理原则主要是()。
A. 止痛 B. 预防肺部感染 C. 气管插管 D. 气管切开 E. 手术治疗 [单项选择]制订工程项目风险应对计划的主要工作是( )。
A. 确订识别项目风险的步骤 B. 确定应对不利事件的策略 C. 制订以往项目的风险清单 D. 确定量化项目风险的方法 [简答题]第四套人民币中的()使用了磁性油墨凹印图文。
[填空题]Advances in medical technology have made it possible for people(live) _____ longer.
[单选题](4540)配砟车运行到指定地,1号位负责调整发动机转速在( ) r/min
A.600 B.900 C.1200 D.1500 [判断题]由于煤的不完全燃烧而产生还原性气体会使锅炉受热面结焦加剧。
A.正确 B.错误 [判断题]记账凭证账务处理程序的特点是直接根据每张记账凭证逐笔登记总分类账。( )
[判断题]电流互感器不完全星形接线,不能反应所有的接地故障。( )
A.正确 B.错误 [判断题]新民主主义革命由无产阶级领导,但并不消灭一般的资本主义。( )
A.正确 B.错误 [简答题]若忽略系统的外漏,急冷水(包括工艺水)系统的补充水为多少?
[单选题]使用中的氧气瓶和乙炔气瓶应垂直固定放置,氧气瓶和乙炔气瓶的距离不准小于()m。
A.3 B.4 C.5 D.6 [判断题]个别互感器在运行中损坏需要更换时,应选用电压等级、变比与原来相同,极性正确的互感器,并经试验合格。但伏安特性或励磁特性不得相近。
A.正确 B.错误 我来回答: 提交
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