盲板两侧均应有（），并把紧螺栓，以保持严密性。A、阀门 B、压力表 C、标识 D、垫

根据短文内容，从下框的A---F选项中选出能概括每一段主题的最佳选项,并在答题卡上将该选项涂黑。 选项中有一项为多余选项。

A. Current reviews and suggestions

B. Commercial pressures on people in charge

C. Mixed views on current changes to museums

D. Collections of factual evidence

E. Interpreting the facts to meet visitor expectations

F. Fewer differences between public attractions

小题1:              

It was convinced that historical relics provide evidence about the past. Such conviction was, until recently, reflected in museum displays. Museums used to look - and some still do - much like storage rooms of objects packed together in showcases: good for scholars to study, but not for the average visitor, to whom it all looked alike.

小题2:                

Recently, however, attitudes towards history and the way it should be presented have become different. The key word in heritage display is now ‘experience’, the more exciting the better and, if possible, involving all the senses. On so called heritage sites computers will soon provide reality experiences, which will present visitors with a vivid image of the period of their choice, in which they themselves can act as if part of the historical environment. Such developments have been criticized by some experts, but the success of many historical theme parks suggests that the majority of the public does not share this opinion.

小题3:                 

In a related development, the sharp distinction between museum and heritage sites on the one hand, and theme parks on the other is gradually evaporating(蒸发). They already borrow ideas and concepts from one another. For example, museums have adopted storylines for exhibitions, sites have accepted ‘theming’ as a relevant tool, and theme parks are moving towards more realness and research-based presentations.

小题4:                 

Theme parks are undergoing other changes, too, as they try to present more serious social and cultural issues, and move away from fantasy. This development is a response to market forces and exhibits must be both based on artifacts and facts as we know them, and attractively presented. Those who are professionally working in the art of interpreting(诠释) history are thus in a difficult position, as they must manage a narrow course between the demands of ‘evidence’ and ‘attractiveness’, especially given the increasing need in this industry for income making activities.

小题5:                 

It could be claimed that in order to make everything in heritage more ‘real’, historical accuracy must be increasingly changed. For example, in the Museum of Natural History in Washington, Neanderthal man is shown making a commanding gesture to his wife. Such presentations tell us more about contemporary understandings of the world than about our ancestors. In fact if the professionals did not provide the interpretation, visitors would do it for themselves, based on their own ideas, misconceptions and prejudices. And no matter how exciting the result, it would contain a lot more bias(偏见) than the presentations provided by experts.

下列关于晶体的说法正确的组合是

①分子晶体中都存在共价键

②在晶体中只要有阳离子就一定有阴离子

③金刚石、SiC、H₂O、H₂S晶体的熔点依次降低

④离子化合物中只有离子键没有共价键，分子晶体中肯定没有离子键

⑤晶体中（晶胞结构如图所示）每个 和12个 相紧邻

⑥晶体中每个硅原子与两个氧原子以共价键相结合

⑦分子晶体中分子间作用力越大，分子越稳定

⑧氯化钠溶于水时离子键被破坏

A．②⑤⑦         

B．①③④             

C．③⑤⑥              

D．③⑤⑧ 

国有企业改建为股份有限公司，发起人可以少于5人，但应当采取( )方式。

A．发起设立

B．借贷设立

C．集资设立

D．募集设立

红色经典专题片《金沙》弘扬了主旋律，体现了社会主义核心价值观、扩大张掖红色文化影响力。它主要反映了中国工农红军西路军西征中的哪次战役？

分部工程质量评定组织（）。

A、在班组自检的基础上，由单位工程负责人组织有关人员进行评定，专职质量检查员核定

B、由企业技术负责人组织企业有关部门进行检验评定，并应将有关评定资料提交当地工程质量监督或主管部门核定

C、由相当于施工队一级的技术负责人组织评定，专职质量检查员核定

D、三者皆可。