The experiment results indicated that conditional on transforming layer 1mm thick and absorbing layer 2mm thick , the combined materials which were processed by 600 and 800 respectively have good absorbing performance , and the influence of the combing sequence on absorbing performance is indistinctive 实验表明，当变换层为1mm ，吸收层为2mm时，以600处理的和800处理的材料进行不同组合都有较好的吸波性能。
2.
China abounds in resources and occupies an important position in the exploitation and utilization of the global natural resources . because of lacking a distinctive definition of property right for natural resources in china , over a long period of time , the limits of management authorities was indistinctive , and various property right structures occurred . consequently , many problems were resulted such as careless and extensive management of natural resources , serious consumption and wastage of resources etc 长期以来，由于我国自然资源产权界定不清晰，管理权限之间界限不清，出现政出多头的产权结构，导致自然资源粗放经营，消耗浪费严重，所以明确界定我国自然资源的产权归属，建立有中国特色的自然资源产权制度就刻不容缓。
3.
However , there still exist a few problems in the higher vocational education , such as unclear thinking , inappropriate system , indistinctive features , and old - fashioned patterns , which originated in the imperfect and unhealthy system of the higher vocational education and have now become bottlenecks in the development of china ' s higher vocational education 但是，还应当清醒地看到当前高职教育在发展中还面临着一些问题，如思路不清、体制不顺、特色不明显、模式老化等，其根源在于高职教育体系不健全、不完善，这成为制约我国高等职业教育发展的瓶颈。
