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排序题

A. even without international links

B. Chinese students and academics

C. the crisis on economic growth

D. A strong research system

E. in part because of this

  Education and academic quality can mean different things to different people, depending on their perspective, role and context and, 1 , quality is notoriously difficult to evaluate. The question of how to do this has been pursued for many years.

  Nevertheless, the goal of improving educational quality is agreed by all and stimulated further by the recent worldwide economic downturn and the need to counteract the impact of 2 and prepare for economic recovery.

  As the World Bank and UNESCO said 10 years ago: “The quality of knowledge generated within higher education institutions, and its availability to the wider economy, is becoming increasingly critical to national competitiveness.” They also rightly emphasized that “ 3 at the national level opens up the possibility that substantial additional public benefits can be realized through international links.”

  This is precisely why 4 should contribute to these global benefits, reforming and improving evaluation systems for educational and academic quality. Original and good research, especially in science, economics and social sciences, has a trickle-down effect on society. And it offers additional benefits 5 , though international collaboration and exchange of the best evaluation policy and practice can bring substantial advantages to all partners in relation to lessons learned elsewhere.

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单选题

钢的表面与周围介质发生化学作用或电化学作用而遭到侵蚀破坏的过程,称为钢材的( )

  • 滑移

  • 锈蚀

  • 时效

  • 冷处理

单选题

下列关于钢材在使用中防止锈蚀说法有误的一项是( )

  • 埋于混凝土中的钢筋,处于碱性介质的条件而使钢筋表面形成氧化保护膜,故不致锈蚀

  • 钢结构防止锈蚀的方法通常是采用表面刷漆

  • 薄壁钢材采用热浸镀锌或镀锌后加涂塑料涂层,防止锈蚀的效果最好,但价格较高

  • 重要的预应力承重结构,可以掺用氯盐,并对原材料进行严格检验控制

单选题

在仓储中钢材锈蚀防止做法错误的一项是( )

  • 金属材料入库时,在装卸搬运、码垛以及保管过程中,对其防护层和外包装加以保护

  • 选择适宜的保管场所;妥善的苫垫、码垛和密封;严格控制温湿度

  • 金属表面涂敷防锈油(剂),把金属表面与周围大气隔离

  • 金属材料在保管期间,必须按照规定的检查制度,每两年进行一次检查

单选题

根据锈蚀作用机理,钢材的锈蚀可分为( )

  • 物理锈蚀和化学锈蚀

  • 物理锈蚀和力学锈蚀

  • 化学锈蚀和电化学锈蚀

  • 物理锈蚀和电化学锈蚀