维普中文期刊产品整合服务
169815篇 您的检索式:期刊名="Environments"
    题名 作者 年代 出处 被引量
1CO_2 Emission Induced by Urban Household Consumption in China显示文摘Household consumption is one of the important factors that induce CO2 emission.Based on input-output model,this article calculated the intensity of CO2 emission of different income groups and seven provinces in China,and then estimated total CO2 emission induced by urban household consumption from 1995 to 2004 in China based on statistic data of household living expenditure.The results show that CO2 emission per capita induced by household consumption had increased from 1583 to 2498 kg CO2 during 1995-2004.The ratio of consumption-induced CO2 emission to total CO2 emission had risen from 19% to 30% in the past decade.Indirect CO2 emission accounted for an important part of the consumption-induced emission,the ratio of indirect emission to consumption-induced emission had risen from 69% to 79% during the same period.A significant difference in consumption-induced CO2 emission across different income groups and different regions has been observed.CO2 emission per capita of higher income groups and developed regions increased faster than that of lower income groups and developing regions.Changing lifestyle has driven significant increase in CO2 emission.Especially,increases in private transport expenditure(for example,vehicle expenditure) and house building expenditure are key driving factors of growth in consumption-induced CO2 emission.There are big differences in the amount of CO2 emission induced by change in lifestyle across different income groups and provinces.It can be expected that lower income households and developing regions will increase consumption to improve their livings with income growth in the future,which may induce much more CO2 emission.A reasonable level of CO2 emission is necessary to satisfy human needs and to improve living standard,but a noticeable fact is that CO2 emission per capita induced by household consumption in developed areas of China had reached a quite high level.Adjustment in lifestyle towards a low-carbon society is in urgent need.Wang Yan1,2,3,Shi Minjun1,2 1.Graduate University of Chinese Academy of Sciences,Beijing 100049,China 2.Research Center on Fictitious Economy and Data Science,CAS,Beijing 100190,China 3.Communications University of China,Beijing 100024,China 2009Chinese Journal of Population,Resources and Environment2009,7,3:22
2Applications of metal–organic frameworks for green energy and environment: New advances in adsorptive gas separation, storage and removal显示文摘The separation of gas molecules with similar physicochemical properties is of high importance but practically entails a substantial energy penalty in chemical industry. Meanwhile, clean energy gases such as H_2 and CH_4 are considered as promising candidates for the replacement of traditional fossil fuels. However, the technologies for the storage of these gases are still immature. In addition, the release of anthropogenic toxic gases into the atmosphere is a worldwide threat of growing concern. Both in academia and industry, considerable research efforts have been devoted to developing advanced porous materials for the effective and energy-efficient separation, storage, or capture of the related gases. In contrast to conventional inorganic porous materials such as zeolites and activated carbons, metal–organic frameworks(MOFs) are considered as a type of promising materials for gas separation and storage. In this contribution, we review the recent research advance of MOFs in some relevant applications, including CO_2 capture, O_2 purification, separation of light hydrocarbons, separation of noble gases, storage of gases(CH_4,H_2, and C_2 H_2) for energy, and removal of some gaseous air pollutants(NH_3, NO_2, and SO_2). Finally, an outlook regarding the challenges of the future research of MOFs in these directions is given.Bin Wang Lin-Hua Xie Xiaoqing Wang Xiao-Min Liu Jinping Li Jian-Rong Li 2018Green Energy & Environment2018,3,3:18
3Overview of acidic deep eutectic solvents on synthesis,properties and applications显示文摘This review divides the acidic deep eutectic solvents(ADES) into Br?nsted and Lewis DES according to their diversity of acidic character.The hydrogen bond donors and halide salts for formulating an ADES are classified, the synthesis methods are described, and the physicochemical properties including freezing point, acidity, density, viscosity and conductivity are presented. Furthermore, the applications of Br?nsted acidic deep eutectic solvents(BADES) and Lewis acidic deep eutectic solvents(LADES) are overviewed, respectively, covering the fields in dissolution, extraction, organic reaction and metal electrodeposition. It is expected that the ADES has great potential to replace the pollutional mineral acid, expensive and unstable solid acid, and costly ionic liquid in many acid-employed chemical processes, thus meeting the demands of green chemistry.Hao Qin Xutao Hu Jingwen Wang Hongye Cheng Lifang Chen Zhiwen Qi 2020Green Energy & Environment2020,5,1:17
4Study on the efficiency and regional disparity of green technology innovation in China's industrial companies显示文摘This paper first constructed a system to evaluate the innovation efficiency of industrial companies within China's Mainland.Then,a principal component analysis(PCA) was performed to these indicators for dimensionality reduction,so as to figure out the technology innovation efficiency in these two phases,respectively.Finally,the overall efficiency of industrial companies in different regions was estimated and factorized via data envelopment analysis(DEA).The results showed that:(1)the efficiency of green technology innovation of industrial companies in China was relatively low as a whole,which mainly resulted from pure technical efficiency(PTE).Further,this huge gap continues to expand in these regions.And both PTE and scale efficiency(SE) in central and western regions leave much to be expected.(2)In the first phase of green technology development,when environmental factors were concerned,the efficiency was much lower than that without environmental considerations.Besides,the central and western regions were facing increasingly severe environmental problems,and there was a wide disparity in technology development efficiency among eastern,central,and western regions.(3)In the second phase of green technology commercialization,there were still more rooms for improvement in raising the efficiency of green technology innovation,and the efficiency in eastern,central,and western regions was ranked from highest to lowest.(4)Liaoning,Hebei,Heilongjiang,Xinjiang,Shanxi,Inner Mongolia,Yunnan,and Qinghai should focus on improving their technology;Jilin,Jiangxi,Anhui,and Guangxi should make their efforts to reduce resource redundancy;whereas Ningxia and Gansu should try to solve the above two issues.Liangwen Luo Shengrong Liang 2016Chinese Journal of Population,Resources and Environment2016,16,4:16
5Application of deep eutectic solvents in biomass pretreatment and conversion显示文摘Biomass is renewable, abundant, cheap, biocompatible, and biodegradable materials and has been used to produce chemicals, materials,energy, and fuels. However, most of the biomass, especially most of the biomass polymers are not soluble in common solvents, which hinders their pretreatment and conversion. Deep eutectic solvents(DESs) are environmental-friendly, cheap, and highly tunable, with high solubility,which renders them potential applications in biomass pretreatment and conversion. They could be used as solvents or catalysts and so on. This paper intends to review the application of DESs for the pretreatment of biomass and conversion of biomass to value-added products. We focus on the following topics related to biomass and DESs:(1) DESs for the pretreatment of biomass;(2) DESs for the dissolution and separation of biomass or extraction of chemicals from biomass;(3) DESs for biomass conversion;(4) Drawbacks, and recyclability of DESs for pretreatment and conversion of biomass.Yu Chen Tiancheng Mu 2019Green Energy & Environment2019,4,2:15
6A comprehensive review on recent progress in aluminum-air batteries显示文摘The aluminum-air battery is considered to be an attractive candidate as a power source for electric vehicles(EVs) because of its high theoretical energy density(8100 Wh kg^(-1)), which is significantly greater than that of the state-of-the-art lithium-ion batteries(LIBs). However,some technical and scientific problems preventing the large-scale development of Al-air batteries have not yet to be resolved. In this review, we present the fundamentals, challenges and the recent advances in Al-air battery technology from aluminum anode, air cathode and electrocatalysts to electrolytes and inhibitors. Firstly, the alloying of aluminum with transition metal elements is reviewed and shown to reduce the selfcorrosion of Al and improve battery performance. Additionally for the cathode, extensive studies of electrocatalytic materials for oxygen reduction/evolution including Pt and Pt alloys, nonprecious metal catalysts, and carbonaceous materials at the air cathode are highlighted.Moreover, for the electrolyte, the application of aqueous and nonaqueous electrolytes in Al-air batteries are discussed. Meanwhile, the addition of inhibitors to the electrolyte to enhance electrochemical performance is also explored. Finally, the challenges and future research directions are proposed for the further development of Al-air batteries.Yisi Liu Qian Sun Wenzhang Li Keegan R.Adair Jie Li Xueliang Sun 2017Green Energy & Environment2017,2,3:13
7Research on Methods of Ecological Security Assessment of the Middle and Lower Reaches of Liaohe River Based on GIS显示文摘Ecological security assessment and early warning research possess the attributes of spatiality, non-linearity and randomicity, so we must process much spatial information. Spatial analysis and data management are the advantages of GIS, which can define distribution trend and spatial relations of environmental factors, and show ecological security pattern graphically. Spatial differences of ecological security assessment based on GIS are discussed in this paper, of which the middle and lower reaches of the Liaohe River is taken as a study case. First, to work out pressure-state-response (P-S-R) assessment indicators system, and investigate in person and gather information; second, to digitize the watershed; third, to quantize and calculate by the fuzzy method; last, to construct GIS grid database, and expound spatial differences of ecological security by GIS interpolation and assembly analysis.Wang Geng 1,2 , Nie Baochi 3, Wang Lin 1 & Wu Wei 1 1. School of Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, China 2. Urban and Environmental School, Liaoning Normal University, Dalian 116029, China 3. Shenyang Buraue of Water Resources, Shenyang 110013, China. 2005Chinese Journal of Population,Resources and Environment2005,3,4:12
8A review on photoelectrochemical cathodic protection semiconductor thin films for metals显示文摘Photoelectrochemical(PEC) cathodic protection is considered as an environment friendly method for metals anticorrosion. In this technology, a n-type semiconductor photoanode provides the photogenerated electrons for metal to achieve cathodic protection. Comparing with traditional PEC photoanode for water splitting, it requires the photoanode providing a suitable cathodic potential for the metal, instead of pursuit ultimate photon to electric conversion efficiency, thus it is a more possible PEC technology for engineering application. To date, great efforts have been devoted to developing novel n-type semiconductors and advanced modification method to improve the performance on PEC cathodic protection metals. Herein, recent progresses in this field are summarized. We highlight the fabrication process of PEC cathodic protection thin film, various nanostructure controlling, doping, compositing methods and their operation mechanism. Finally, the current challenges and future potential works on improving the PEC cathodic protection performance are discussed.Yuyu Bu Jin-Ping Ao 2017Green Energy & Environment2017,2,4:12
9A closed-loop process for recycling LiNi_xCo_yMn_((1-x-y))O_2 from mixed cathode materials of lithium-ion batteries显示文摘With the rapid development of consumer electronics and electric vehicles(EV), a large number of spent lithium-ion batteries(LIBs) have been generated worldwide. Thus, effective recycling technologies to recapture a significant amount of valuable metals contained in spent LIBs are highly desirable to prevent the environmental pollution and resource depletion. In this work, a novel recycling technology to regenerate a LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2 cathode material from spent LIBs with different cathode chemistries has been developed. By dismantling, crushing,leaching and impurity removing, the LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2(selected as an example of LiNi_xCo_yMn_(1-x-y)O_2) powder can be directly prepared from the purified leaching solution via co-precipitation followed by solid-state synthesis. For comparison purposes, a fresh-synthesized sample with the same composition has also been prepared using the commercial raw materials via the same method. X-ray diffraction(XRD), scanning electron microscopy(SEM) and electrochemical measurements have been carried out to characterize these samples. The electrochemical test result suggests that the re-synthesized sample delivers cycle performance and low rate capability which are comparable to those of the freshsynthesized sample. This novel recycling technique can be of great value to the regeneration of a pure and marketable LiNi_xCo_yMn_(1-x-y)O_2 cathode material with low secondary pollution.Rujuan Zheng Wenhui Wang Yunkun Dai Quanxin Ma Yuanlong Liu Deying Mu Ruhong Li Jie Rena Changsong Dai 2017Green Energy & Environment2017,2,1:11
10Synthesis and applications of MOF-derived porous nanostructures显示文摘Metal organic frameworks(MOFs) represent a class of porous material which is formed by strong bonds between metal ions and organic linkers. By careful selection of constituents, MOFs can exhibit very high surface area, large pore volume, and excellent chemical stability.Research on synthesis, structures and properties of various MOFs has shown that they are promising materials for many applications, such as energy storage, gas storage, heterogeneous catalysis and sensing. Apart from direct use, MOFs have also been used as support substrates for nanomaterials or as sacrificial templates/precursors for preparation of various functional nanostructures. In this review, we aim to present the most recent development of MOFs as precursors for the preparation of various nanostructures and their potential applications in energy-related devices and processes. Specifically, this present survey intends to push the boundaries and covers the literatures from the year 2013 to early 2017,on supercapacitors, lithium ion batteries, electrocatalysts, photocatalyst, gas sensing, water treatment, solar cells, and carbon dioxide capture.Finally, an outlook in terms of future challenges and potential prospects towards industrial applications are also discussed.Min Hui Yap Kam Loon Fow George Zheng Chen 2017Green Energy & Environment2017,2,3:11
11Carbon dioxide emissions from cities in China based on high resolution emission gridded data显示文摘Based on the China high resolution emission gridded data(1 km spatial resolution), this article is aimed to create a Chinese city carbon dioxide(CO_2) emission data set using consolidated data sources as well as normalized and standardized data processing methods. Standard methods were used to calculate city CO_2 emissions, including scope 1 and scope 2. Cities with higher CO_2 emissions are mostly in north, northeast, and eastern coastal areas. Cities with lower CO_2 emissions are in the western region. Cites with higher CO_2 emissions are clustered in the Jing-Jin-Ji Region(such as Beijing, Tianjin, and Tangshan), and the Yangtze River Delta region(such as Shanghai and Suzhou).The city per capita CO_2 emission is larger in the north than the south. There are obvious aggregations of cities with high per capita CO_2 emission in the north. Four cities among the top 10 per capita emissions(Erdos, Wuhai, Shizuishan, and Yinchuan) cluster in the main coal production areas of northern China. This indicates the significant impact of coal resources endowment on city industry and CO_2 emissions. The majority(77%) of cities have annual CO_2 emissions below 50 million tons. The mean annual emission, among all cities, is 37 million tons. Emissions from service-based cities, which include the smallest number of cities, are the highest. Industrial cities are the largest category and the emission distribution from these cities is close to the normal distribution. Emissions and degree of dispersion, in the other cities(excluding industrial cities and service-based cities), are in the lowest level. Per capita C02 emissions in these cities are generally below 20 t/person(89%) with a mean value of 11 t/person. The distribution interval of per capita CO_2 emission within industrial cities is the largest among the three city categories. This indicates greater differences among per capita CO_2 emissions of industrial cities. The distribution interval of per capita CO_2 emission of other cities is the lowest, indicating smaller differences of per capita CO_2 emissions among this city category. Three policy suggestions are proposed: first, city CO_2 emission inventory data in China should be increased,especially for prefecture level cities. Second, city responsibility for emission reduction, and partitioning the national goal should be established, using a bottom-up approach based on specific CO_2emission levels and potential for emission reductions in each city. Third, comparative and benchmarking research on city CO_2 emissions should be conducted, and a Top Runner system of city CO_2emission reduction should be established.Bofeng Cai Jinnan Wang Shuying Yang Xianqiang Mao Libin Cao 2017Chinese Journal of Population,Resources and Environment2017,15,1:10
12Environment as the Stage for Economic Actors显示文摘The relative importance of economics and environment in debate may soon be reversed due to the influence of three fac- tors. Firstly, in the global economy it is hard to hide the unwanted products of economic processes. Secondly, huge advances in sci- ence will reduce the imperfect knowledge of markets, making some monitoring and analyzing tools show the design of sensible and equitable livelihood in communities, which is more important than the motivation of maximising profits for some individuals or firms. Thirdly, China, as the last major player on the planet to take on economic growth, comes from traditions fundamentally differ- ent from those economies that have experienced the Industrial Revolution previously. Its challenges with sustainability and en- vironmental conservation predate Western economics by millennia, and it is implementing policies domestically and starting to work on the world stage that acknowledges that the surroundings are the host for any economic and socio-political system.John E Coulter Shi Lei Samantha Jenkins 2007Chinese Journal of Population,Resources and Environment2007,5,1:10
13Air pollution in mega cities in China显示文摘Chak K. Chan Xiaohong Yao 2007Atmospheric Environment2007,,1:10
14Catalyst design strategies towards highly shape-selective HZSM-5 for paraxylene through toluene alkylation显示文摘With the shape selective zeolite catalyst,toluene alkylation with methanol to para-xylene(MTPX)technology could produce highly pure para-xylene(PX)in one step.The lower feedstock cost and less energy consumption in products separation make it more competitive compared to the current toluene disproportionation route.Thus,MTPX is regarded as the most reasonable production route for PX production.This article reviews the strategies that applied to the preparation of high-performance catalysts for MTPX,with special focus on the precise control of pore dimension and acid sites distribution in zeolite to achieve the highest selectivity to PX.The outlook of the MTPX catalyst is also proposed to guide the catalyst development in the field.Xin Huang Ruizhuang Wang Xu Pan Chuanfu Wang Maohong Fan Yufei Zhu Yonggang Wang Jin Peng 2020Green Energy & Environment2020,5,4:10
15Biomass-derived porous carbon highly efficient for removal of Pb(Ⅱ) and Cd(Ⅱ)显示文摘The utilization of abundant and renewable biomass to fabricate advanced functional materials is considered a promising route for environmental applications.Herein,Lignin-based porous carbon with layered graphene-like structure(LPC)is successfully synthesized and applied to efficiently remove Pb(Ⅱ)and Cd(Ⅱ).The as-synthesized LPC materials are systematically characterized and these results show that LPC has a porous graphene-like structure,facilitating the diffusion and immobilization of heavy metal ions.The influence of different reaction parameters(solution pH,initial concentration of metal ions,contact time and adsorbent amount)on the adsorption performance is investigated in details.The results demonstrate that LPC can achieve superior adsorption capacities of 250.5 mg·g^-1 for Pb(Ⅱ)and 126.4 mg·g^-1 for Cd(Ⅱ),which are far superior to the previously reported adsorbents.Pseudo-second order kinetics model and Freundlich isotherm model describe the adsorption process well.Furthermore,the exhausted LPC can be regenerated easily and exhibits the removal efficiency of 96%and 92%for Pb(Ⅱ)and Cd(Ⅱ)after five continuous runs,respectively.This study shows a sustainable strategy for the design of porous carbon material from na?ve biomass and highlights the great potential in wastewater treatment.Anqi Wang Zhikeng Zheng Ruiqi Li Di Hu Yiran Lu Huixia Luo Kai Yan 2019Green Energy & Environment2019,4,4:10
16Recent progress in rechargeable alkali metal-air batteries显示文摘Rechargeable alkali metal-air batteries are considered as the most promising candidate for the power source of electric vehicles(EVs) due to their high energy density. However, the practical application of metal-air batteries is still challenging. In the past decade, many strategies have been purposed and explored, which promoted the development of metal-air batteries. The reaction mechanisms have been gradually clarified and catalysts have been rationally designed for air cathodes. In this review, we summarize the recent development of alkali metal-air batteries from four parts: metal anodes, electrolytes, air cathodes and reactant gases, wherein we highlight the important achievement in this filed. Finally problems and prospective are discussed towards the future development of alkali metal-air batteries.Xin Zhang Xin-Gai Wang Zhaojun Xie Zhen Zhou 2016Green Energy & Environment2016,1,1:9
17Recyclable adsorbent of BiFeO_3/Carbon for purifying industrial dye wastewater via photocatalytic reproducible显示文摘It is essential to prepare highly-efficiency reproducible adsorbent for purifying industrial dye wastewater. In this work, biscuit with a layered porous structure as a template is applied to prepare a photocatalytic recyclable adsorbent of BiFeO3/Carbon nanocomposites for purifying simulative industrial dye wastewater. It is found that the structure of the prepared BiFeO3/Carbon nanocomposite is related to the natural structure of the biscuit, annealing temperatures and immersing times, demonstrated by XRD, TEM, UV-Vis and adsorptive activities. Kinetics data shows that the adsorption rate of the adsorbent to the dye is rapid and fitted well with the pseudo-second-order model, that more than 80% of dyes can be removed in the beginning 30 min. The adsorption isotherm can be perfectly described by the Langmuir model as well. It can be seen from the adsorption data that the adsorption performance can reach over 90% at pH ? 2–12, which can imply its universal utilization. The prepared BiFeO_3/Carbon nanocomposites have also displayed excellent capacities(over 90% within 30 min) for adsorption of seven different dyes and their mixed one. According to the five times photocatalytic reproducible experiments, it is proved that BiFeO_3/Carbon nanocomposites show the excellent stability and reproduction for purifying simulative industrial dyes, even the sample have been placed for one year. These research results indicate that the adsorbent BiFeO_3/Carbon can be a suitable material used in treating industrial dye wastewater potentially.Shuang Jiao Yiming Zhao Chensha Li Binsong Wang Yang Qu 2019Green Energy & Environment2019,4,1:8
18Research from global Sustainable Development Goals(SDGs)to sustainability science based on the object-subject-process framework显示文摘Since United Nations adopted the global Sustainable Development Goals(SDGs) for the next15 years(2016-2030), sustainable development will further become a core concept and main principle to guide global and national economic and social development. According to this background, strengthening the integrative research on the theories and methodologies of sustainable development has been a strategically important mission. This article provided an analytic framework for sustainability science, named the object-subject-process(OSP) framework for examining the key issues encountered during the theoretical research and policy analysis. This study emphasized that, on the object dimension, sustainable development means to seek for economic and social development within biophysical limits of the earth and the relationship of environment, society, and economy should be containing and complementary rather than parallel and substitute; on the process dimension, sustainable development should adopt both the responsive and proactive strategies for the whole process management which employing pressure-state-response(PRS) model rather than dealing with one part of them; on the subject dimension, sustainable development research should involve the key stakeholders who are kind of collaborate governance rather than separate each other. From the perspective of sustainability science, green economy was utilized as a case study to explore the issues of object, process and subject and also the significance of green economy was discussed in this study.Dajian Zhu 2017Chinese Journal of Population,Resources and Environment2017,15,1:8
19Ionic liquids:Functionalization and absorption of SO_2显示文摘Room-temperature ionic liquids(ILs), which have excellent properties, such as high gas absorption abilities, extremely low volatility and tunable structures, are regarded as environmentally-friendly absorbents and widely used in SO_2 absorption and separation. As a result, a large number of ILs have been synthesized to capture SO_2 from flue gas or simulated gas, but a part of them just have physical interaction with SO_2 and can hardly absorb SO_2 when the content of SO_2 is very low. Hence, functional ILs, which can chemically absorb a large amount of SO_2 with low contents, have been designed and synthesized for SO_2 capture. Up to now, many kinds of functional ILs were investigated for SO_2 absorption from flue gas. In this review, the functional ILs are classified into guanidinium based ILs, hydroxyl ammonium based ILs, imidazolium/pyridinium based ILs, quaternary ammonium based ILs, phosphonium based ILs, and other kinds of ILs according to their cations. The capacities of SO_2 absorption in these ILs, the mechanism of the absorption, and the ways to enhance the absorption are briefly introduced. The prospect of functional ILs for their application in SO_2 removal is presented. The present problems and the further studies are also discussed.Shuhang Ren Yucui Hou Kai Zhang Weize Wu 2018Green Energy & Environment2018,3,3:8
20Advanced chemical strategies for lithium-sulfur batteries: A review显示文摘Lithium-sulfur(Li-S) battery has been considered as one of the most promising rechargeable batteries among various energy storage devices owing to the attractive ultrahigh theoretical capacity and low cost. However, the performance of Li-S batteries is still far from theoretical prediction because of the inherent insulation of sulfur, shuttling of soluble polysulfides, swelling of cathode volume and the formation of lithium dendrites. Significant efforts have been made to trap polysulfides via physical strategies using carbon based materials, but the interactions between polysulfides and carbon are so weak that the device performance is limited. Chemical strategies provide the relatively complemented routes for improving the batteries' electrochemical properties by introducing strong interactions between functional groups and lithium polysulfides. Therefore, this review mainly discusses the recent advances in chemical absorption for improving the performance of Li-S batteries by introducing functional groups(oxygen, nitrogen, and boron, etc.) and chemical additives(metal, polymers, etc.) to the carbon structures, and how these foreign guests immobilize the dissolved polysulfides.Xiaojing Fan Wenwei Sun Fancheng Meng Aiming Xing Jiehua Liu 2018Green Energy & Environment2018,3,1:7
返回顶部 每页显示:
共8491页 首页 上一页 第1页 下一页 末页 /8491 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费