更多“编写机电产品国际招标文件，确定投标有效期的主要依据是____”相关的问题
交流发电机上“B”接线柱为（）、交流发电机上“F”接线柱为（）、交流发电机上“N”接线柱为（）、交流发电机上“E”接线柱为（）。
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C38B的双重隔音指的是（）。
A.缓冲减震设计，动平衡处理研磨盘
B.水磨隔音防溅罩
C.强劲永磁直流电机
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请结合儿童大脑皮质功能特点，讨论学前儿童的用脑卫生保健要点。
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某城市管理行政执法部门对随意倾倒建筑垃圾的建筑公司甲作出罚款5000元的处罚决定，并责令其清理垃圾。关于该执法部门的行为，下列说法正确的是()。
A:两个行为都属于行政处罚
B:前一个行为属于行政处罚，后一行为属于行政强制措施
C:前一个行为属于行政处罚
D:后一个行为属于行政处罚
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较理想的输卵管通畅度的检查方法，主要是（）
A.输卵管通气
B.输卵管通液
C.子宫输卵管造影
D.宫腔镜
E.B超检查
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某LTI连续系统的单位阶跃响应为e－2tu（t)，求当激励为δ（t)＋u（t－2)时的零状态响应。该系统的单位
某LTI连续系统的单位阶跃响应为e－2tu(t)，求当激励为δ(t)＋u(t－2)时的零状态响应。该系统的单位阶跃响应g(t)，并大概画出g(t)的波形图。
该系统的单位阶跃响应g(t)，并大概画出g(t)的波形图。
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人民群众是历史的创造者，其根本原因在于（）A．人民群众是人口的大多数B．劳动群众是生产力的主体C．
人民群众是历史的创造者，其根本原因在于（ ） A．人民群众是人口的大多数 B．劳动群众是生产力的主体 C．人民群众创造社会发展的规律 D．人民群众顺从了社会发展的规律
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The earliest evidence of standardized testing based on merit comes from China during the Han dynasty. The concept of a state ruled by men of ability and virtue was an outgrowth of Confucian philosophy. Standardized testing has not traditionally been a part of European pedagogy. Based on the skeptical and open-ended tradition of debate inherited from Ancient Greece, Western academia favored the essay. The use of standardized testing in the United States is a 20th century phenomenon with its origins in World War I. One of the main advantages of standardized testing is that the results can be empirically documented ; therefore the test scores can be shown to have a relative degree of validity and reliability, as well as results which are generalizable and replicable. This is often contrasted with grades on a school transcript, which are assigned by individual teachers. Another advantage is aggregation. A well designed standardized test provides an assessment of an individual's mastery of a domain of knowledge or skill which at some level of aggregation will provide useful information. Though many educators recognize that standardized tests have a place in tools used to assess student achievement, critics feel that overuse and misuse of these tests is having serious negative consequences on teaching and learning. The temptation is to use the tests to define curriculum and focus instruction. What is not tested is not taught, and how the subject is tested becomes a model for how to teach the subject. Moreover, standardized test scores are problematic tools for school accountability because the examinee scores are influenced by three things: what kids learn in school, what kids learn outside of school, and innate intelligence. Critics believe this is not possible. While it is possible to use a standardized test and not let its limits control curriculum and instruction, this can result in a school putting itself at risk for producing lower test scores, with negative political consequences. Some critics say that some children do not do well on standardized tests, despite mastery of the material, due to testing anxiety or lack of time management or test-taking skills. This reflects the fact that tests cannot directly measure student knowledge, only the ability of students to apply knowledge in a stressful situation. Some parents are willing to pay thousands of dollars to prepare their children for tests, a financial barrier that may give children of more wealthy parents an advantage compared to less affluent families. However this criticism would probably apply even more to testing alternatives such as portfolios or essays. Many studies also show that test coaching has little effect on scores on well-buih tests. The ability of wealthy families to pay for higher-quality education is not specifically related to standardized testing.Which one of the regions does NOT have a long history of standardized testing?A．China.B．Europe.C．United States.D．Africa.
A.B.C.D.E.WhichF.China.B．Europe.C．United
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合理范围低价中标工程，因建筑施工企业原因造成不履行合同或终止合同造成恶劣影响的扣（）分。
A . 40
B . 20
C . 10
D . 5
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系统结构图如图所示： r（t）=2t时，求系统由r（t）产生的稳态误差ess
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下面的绩效考核因素中，不属于能力考核的因素是（）。
A.创新能力
B.技能熟練程度
C.计划能力
D.经验阅歷
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对已经受理的建设项目安全设施设计审查申请，安全生产监督管理部门应当自受理之日起（）个工作日内作出是否批准的决定，并书面告知申请人。
A.5
B.7
C.15
D.20
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发射光谱定量分析选用的“分析线对”应该是怎样的一条线（）。
A. 波长要接近，激发电位可以不接近B. 波长不一定接近，但激发电位要相近C. 波长和激发电位都不一定接近D. 波长和激发电位都应该接近
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消极的心理因素能引起多种疾病，《黄帝内经》中曾多处提到了“怒伤肝”、“喜伤心”、“悲伤（）”、“恐伤肾”。
A.肺
B.脾
C.胃
D.肠
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