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背景介绍：
某公司培训中心以往在进行培训项目评估时，通常就是在培训结束时向培训学员发放一张评估调查表。2013年以来，随着培训工作的转型升级，培训中心决定要进一步加强培训质量管理，要求所有16课时以上的培训项目在项目运行前就要指定培训评估方案，不仅成为培训质量管理的关键控制环节，而且其导向和指导作用也进一步得到体现，通过评估也有效地促进了培训质量的过程控制，收到了实实在在的成效。
问题：结合以上案例和培训实践，您认为一份可行的培训评估方案必须能回答哪些方面的问题？评估标准的指定应遵循怎样的原则和程序？

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For more than a mile， the desert in southern Peru has a curious ruler－straight and tacksharp design made by rocks ． The wandering mule paths that cross it only emphasize its precision． Throughout hundreds of square miles of arid plateau， other such markings around， most of them concentrated between the towns of Nazca and Palpa． Known as the Nazca Lines， they form a geometric mélange of quardrangles， triangles， and trapezoids ． The markings also form spirals and flowers， narrow lines that extend more than five miles， and a desert zoo of giant creatures － birds ， reptiles ， whales， a monkey， and a spider－ all made by stones whose patterns can only be seen from the air． Because some of the figures resemble the ones that decorate Nazca pottery， archaeologistsattribute the lines to the Nazcas， a coastal people whose culture rose， flourished， and declined between 100 B． C． and A． D． 700． Making the patterns must have been extremely time－consuming． The Nazcas must have cleared millions of rocks to expose the lighter ground beneath them，piled the rocks in rows，and created designs that， in this nearly rainless region， can last thousands of years． But why did they construct them？ Nobody really knows． There have been many guesses． Some say that they were prehistoric roads，or farms．Others say they were signals or offerings to celestial beings． It has also been suggested that they constitute a giant astronomical calendar， an almanac for farmers who wished to predict the return of water to valley streams． One study did ascertain that some of the lines point to solstice positions of the sun and moon in ancient times， as well as to the rising and setting points on the horizon of some of the bright stars． But none of the theories have proven to be correct． And so the mystery remains， including the most tantalizing question of all： why did the Nazcas create immense designs that they themselves could never see ， designs that people nowadays can only see from the air？ One person who worked to find out the answer was Maria Reiche． For over forty years she photographed and charted “las lineas”， striving to complete a map of the hundreds of designs and figures of this area， which is some thirty miles long and threaded by the Pan American highway． This determined German － born mathematician slept on a camp cot behind her car on the rocky， grassless Peruvian “pampa”， and even when she was elderly， got up before daylight to conduct her research． She scorned the suggestion that the markings may have been airfields for outer － space visitors to earth during prehistoric times． “Once you remove the stones， the ground is quite soft，” she said． “I’m afraid the spacemen would have gotten stuck．” Although Maria Reiche was not able to find the answer ， she crusaded to preserve the patterns so that others following her might have a chance to do so． Questions 1 to 5 Answer the following questions with the information given in the passage in a maximum of fifteen words for each question． 1． Why do people name the patterns the Nazca Lines？2． Are there any definite reasons for the construction of Nazca Lines？ If not， what does the author offer？3． Could those who built the Nazca Lines see the patterns？ If not， how can people now see them？ 4． Did Maria Reiche believe the Nazca Lines have something to do with outer－space visitors？ What was her reason？ 5． What’s Reiche’s contribution about the mystery of the Nazca Lines even though she had not solved it herself？

中小型变配电所的继电保护有哪些？

根据保险法规定,投保人与保险人约定保险权利义务关系的协议称为()

A. 保险合同
B. 保险价值
C. 保险关系
D. 保险协议

按承载件的不同，起重葫芦可分为_和_。