检索结果-内蒙古大学图书馆

Enhanced Fenton-like catalytic performance by the interaction between nanoscale metal particles and single atom catalysts

引用

Separation and Purification technology 2025年 375卷

作者： Jiajie Wang Suhua Chen Bo Li Wei Ren Yuqi Zhu Xinyu Liu Zirong Liu Fanying Xia Min Cheng Jianping Zou Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resource Reuse School of Environmental and Chemical Engineering Nanchang Hangkong University Nanchang 330063 China School of Environment and Energy South China University of Technology Guangzhou Higher Education Mega Centre Guangzhou 510006 China College of Environmental Science and Engineering Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education) Hunan University Changsha 410082 China

Single-atom catalysts (SACs) exhibit unique advantages in Fenton-like reactions by virtue of their maximized atom utilization and unsaturated coordination structure. Notably, the high surface free energy leads to the inevitable generation of nanoscale metal cluster/particles (NMPs) during the synthesis of SACs. With the development of research, NMPs as a previously unappreciated by-product has been recognized as an effective strategy to enhance the catalytic performance of SACs. Therefore, it is particularly important to gain a deep understanding of the NMPs formed during the fabrication of SACs and how they interact with SACs as well as their synergistic effects in the Fenton-like process. Based on this, this review first summarizes the synthesis strategy of NMP-SACs. Immediately thereafter, the synergistic effects between NMPs and SACs sites are analyzed in depth, aiming to elucidate the mechanism behind the dominance of NMP-SACs. Subsequently, the progress of NMP-SACs in the representation of Fenton-like systems is presented. Then, several key factors facilitating the practical application of NMP-SACs are emphasized. Finally, the main challenges and prospects for development of current research are summarized to guide the design of next-generation catalysts.

关键词： Fenton-like processes Interaction NMPs SACs

来源：评论

学校读者我要写书评

暂无评论

Effect of High Alumina-Based Solid Waste on Efflorescence Behavior of Alkali-Activated Steel Slag

SSRN

引用

SSRN 2022年

作者： Zhang, Ruobing Zhang, Yimin Liu, Tao Wan, Qian Zheng, Dalong School of Resource and Environmental Engineering Wuhan University of Science and Technology Hubei Province Wuhan430081 China State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control Wuhan University of Science and Technology Hubei Province Wuhan430081 China Collaborative Innovation Center of Strategic Vanadium Resources Utilization Wuhan University of Science and Technology Hubei Province Wuhan430081 China Hubei Provincial Engineering Technology Research Center of High efficient Cleaning Utilization for Shale Vanadium Resource Wuhan University of Science and Technology Hubei Province Wuhan430081 China

In this paper, the influences of efflorescence on the property of alkali-activated steel slag materials were investigated, and the (Spent Fluid Cracking Catalytic) SFCC catalyst was used as an additive to control efflorescence. The property and microstructure of alkali activated cementitious materials synthesized with different raw materials composition was characterized by XRD, FTIR, TG and SEM-EDS. The efflorescence degree of different products was also evaluated. The C-S-H was mainly formed during the alkali-activated steel slag, which is difficult to adsorb the alkali metal ions, resulting in the serious efflorescence and a reduction of compressive strength. As the addition of SFCC catalyst increased, more N-A-S-H gels formed and adsorbed alkali metal ions, while inhibiting the efflorescence and its effect on mechanical property. In addition, the [AlO 4 ] - contained in the N(C)-A-S-H exhibit stronger adsorption properties for calcium ions than for sodium ions. This study not only proposed a new method of synergistic utilization of steel slag and waste SFCC catalyst, but also provided a further understanding of efflorescence. © 2022, The Authors. All rights reserved.

关键词： Catalysts

来源：评论

学校读者我要写书评

暂无评论

Identification of microplastics in landfill leachate: An underestimated tiny microplastics using Focal Plane Array (FPA)-based Fourier Transform Infrared (FTIR) imaging

引用

Journal of Environmental Sciences 2025年

作者： Shijie Bian Timing Jiang Jingwei Yan Rui Cai Shushan Yuan Wenbo Yu Sha Liang Liang Huang Huabo Duan Mukesh Kumar Awasthi Jiakuan Yang Hubei Key Laboratory of Multi-media Pollution Cooperative Control in Yangtze Basin School of Environmental Science & Engineering Huazhong University of Science and Technology (HUST) 1037 Luoyu Road Wuhan 430074 China Hubei Provincial Engineering Laboratory for Solid Waste Treatment Disposal and Recycling Wuhan 430074 China Hubei Provincial Research Center of Water Quality Safety and Water Pollution Control Engineering Technology Huazhong University of Science and Technology Wuhan 430074 China College of Natural Resources and Environment Northwest A&F University Yangling 712100 China State Key Laboratory of Coal Combustion Huazhong University of Science and Technology Wuhan 430074 China

Landfills are significant contributors to the generation of microplastics (MPs) in the environment. However, how to accurately identify and quantify tiny MPs (10-100 μm) in landfill leachate remains an ongoing challenge. The identification of MPs in the leachate of operating and closed landfills was comparatively investigated using attenuated total reflectance-Fourier transform infrared (ATR-FTIR) and focal plane array-based micro-Fourier-transform infrared (FPA-FTIR) imaging. The abundance of MPs detected by FPA-FTIR (70-235 items/L) was two-order magnitude higher than that by ATR-FTIR (2-7 items/L), indicating that FPA-FTIR was more efficient in detecting tiny MPs than ATR-FTIR. Furthermore, the MPs in landfill leachate from 13 different landfills in China, comprising both operating and closed landfills, were determined by FPA-FTIR. The morphology of MPs mainly consists of white fragments, and they are predominantly high-density engineering plastics, which make up 90 % of the total MPs. In operating landfills, the abundance of MPs ranged from 175 to 5320 items/L. The abundance initially increased to a maximum peak at around 15 years of landfill age, and then declined as the landfill continued to operate. In closed landfills, the abundance of MPs showed a decreasing trend with the increasing of landfill closure age. The operational conditions and landfill age significantly affect the quantity of MPs in leachate; however, they do not exert a notable influence on the morphological characteristics of MPs in leachate. This study provided valuable insights for evaluating the transportation and migration behavior of MPs from landfill cells into leachate.

关键词：

来源：评论

学校读者我要写书评

暂无评论

PORK PRODUCTION SYSTEMS IN CHINA:A REVIEW OF THEIR DEVELOPMENT,CHALLENGES AND PROSPECTS IN GREEN PRODUCTION

引用

Frontiers of Agricultural Science and Engineering 2021年第1期8卷 15-24页

作者： Shuai ZHANG Xin WU Dandan HAN Yong HOU Jianzhuang TAN Sung Woo KIM Defa LI Yulong YIN Junjun WANG State Key Laboratory of Animal Nutrition Ministry of Agriculture and Rural Affairs Feed Industry CentreCollege of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193China Key Laboratory of Agro-ecological Processes in the Subtropical Region Institute of Subtropical Agriculturethe Chinese Academy of SciencesNational Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry ProductionHunan Provincial Engineering Research Center for Healthy Livestock and Poultry ProductionScientific Observation and Experimental Station of Animal Nutrition and Feed Science in the South-Central RegionMinistry of Agriculture and Rural AffairsChangsha 410125China College of Resources and Environmental Sciences National Academy of Agriculture Green DevelopmentKey Laboratory of Plant-Soil Interactions(Ministry of Education)China Agricultural UniversityBeijing 100193China Tech-bank Food Co. LtdNanjing 211800China Department of Animal Science College of Agriculture and Life SciencesNorth Carolina State UniversityRaleighNC 27695USA

This paper reviews the changes in pork production in China,the largest pork producing and consuming nation in the *** pork sector in China has changed dramatically since the 1990s,with large-scale intensive pork production systems replacing the former,exclusively family-based pork production *** breeding,feeding,vaccinating,and management technologies are widely used ***,smallholders still account for a large proportion of the total *** intensification and specialization of the pork sector is expected to continue in the future,but there is increasing awareness and pressure to develop more environmentally-sustainable production *** relative shortage of domestically produced feed,the low utilization efficiency of feed ingredients,the large emissions of nitrogen and phosphorus to the environment,the high use of antibiotics,and the presence of residual metals in manures are very large challenges for the pork sector *** solve these problems,techniques including new feed resource utilization,precise feeding,low-protein diets,alternatives to antibiotics and increased manure recycling are all important topics and research directions *** new techniques and management approaches,it is possible to build more sustainable pork production systems in China.

关键词： China feed pork production sustainability

来源：评论

学校读者我要写书评

暂无评论

Age- and Sex-Specific Dermal Exposure of Polycyclic Aromatic Hydrocarbons in General Population from a City in South China

SSRN

引用

SSRN 2022年

作者： Guo, Jian Luo, Xiaojun Yang, Yan Lv, Yinzhi Zeng, Yanhong Maia, Bixian State Key Laboratory of Organic Geochemistry Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou510640 China University of Chinese Academy of Sciences Beijing100049 China Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou510640 China School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou510006 China Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory Guangdong Jieyang515200 China

This study assessed the dermal exposure of population to polycyclic aromatic hydrocarbons (PAHs) in a city from South China. Skin wipe samples from face, hand, upper arm, and shank were collected from 120 volunteers (50% male and 50% female) belonging to different age groups (preschooler, thresholder:, middle-aged, and elderly). PAH concentrations in skin wipe samples varied from 18 to 27000 ng/m 2 with the order of face>hand>upper arm> shank regardless of age and gender. PAH concentrations in bare skin locations were significantly higher in female than those in male, while no significant differences were observed for clothing-covered skin locations. The PAH concentrations in face were significantly higher in elderly than those in other groups. PAH composition showed remarkable differences among the four age groups. The dermal exposure levels of total PAHs and total BaP equivalent concentration (BaP eq ) varied from 25.6–620 ng/kg body weight/d and 0.093–37.4 ng/kg body weight/d. The dermal exposure levels of total PAHs were significantly higher in female than in male in all age groups except for middle-aged group. The hand-mouth exposure dose were significantly higher in the preschoolers than in other age groups. The values of the cancerogenic risk caused by dermal PAH exposure were between 3.5×10 -6 and 1.4×10 -3 with 29% population (35/120) having risk higher than the significant levels (1×10 -4 ). The thresholder group exhibited the highest risk for PAH dermal exposure among all population. This study provided a comprehensive evaluation of the age and gender related risk of PAH through dermal exposure. © 2022, The Authors. All rights reserved.

关键词： Polycyclic aromatic hydrocarbons

来源：评论

学校读者我要写书评

暂无评论

Combination of Wastewater Treatment Measures and Landscape Ecological Design in Traditional Villages Based on Sustainability Theory: A Case Study of Miao Village in Xiangxi, China 2

Combination of Wastewater Treatment Measures and Landscape E...

引用

2020 2nd International Conference on Advances in Civil Engineering, Energy resources and Environment Engineering, ACCESE 2020

作者： Tang, Yuanqiang Tang, Yuanxing Zhang, Mengmiao Zhao, Jianmin Liu, Yunguo Long, Shaoqiu Xiao, Can Chen, Yu He, Shaoyao Yang, Chunping College of Environmental Science and Engineering Hunan University Changsha410082 China Ministry of Education Changsha410082 China Secondary School of Industrial and Commercial and Vocational of Yongzhou Yongzhou Hunan425006 China School of Architecture Hunan University Changsha410082 China College of Natural Resources and Environment of South China Agricultural University Guangzhou Guangdong510642 China Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control School of Environmental Science and Engineering Guangdong University of Petrochemical Technology Maoming Guangdong525000 China

The aim of protecting traditional villages is to maintain the population;thus, these villages must be suitable for living. A prerequisite for the liveability of traditional villages is treatment of point and non-point sources of pollution to improve the ecological value of the village. The combination of water pollution control measures and landscape design improves the aesthetic and ecological sustainability. This article takes China's fourth batch of traditional villages, Xiangxi Wengcao Miao Village, as an example. Interviews, field surveys and various discussions were conducted, and the study believes that by connecting the various sewage outlets, they are collected in the first, second and third levels. Treatment ponds (tanks) transformed curved rice fields into secondary treatment tanks and stabilised ponds. Native plants were classified before stable and treatment ponds were excavated. Submerged, floating and emergent plants were artificially planted in the water, and medicinal plants were cultivated around the pond and banks of the creek. These biomass plants are relatively large for the nutrition in the wastewater. Adsorption and digestion of the substance can not only reduce the direct discharge of sewage to downstream regions but also beautify the landscape of the sewage treatment facility. © Published under licence by IOP Publishing Ltd.

关键词： Lakes

来源：评论

学校读者我要写书评

暂无评论

Hotspots lurking underwater: Insights into the contamination characteristics, environmental fates and impacts on biogeochemical cycling of microplastics in freshwater sediments

引用

Journal of hazardous materials 2024年 476卷 135132页

作者： Haojie Chen Danlian Huang Wei Zhou Rui Deng Lingshi Yin Ruihao Xiao Sai Li Fei Li Yang Lei College of Environmental Science and Engineering Hunan University Changsha 410082 PR China Key Laboratory of Environmental Biology and Pollution Control Hunan University Ministry of Education Changsha 410082 PR China. Key Laboratory of Environmental Biology and Pollution Control Hunan University Ministry of Education Changsha 410082 PR China Greater Bay Area Institute for Innovation Hunan University Guangzhou 511300 Guangdong PR China. Electronic address: huangdanlian@***. School of Resources and Environmental Engineering Hefei University of Technology Hefei Anhui 230009 PR China. College of Water Resources & Civil Engineering Hunan Agricultural University Changsha 410128 PR China.

The widespread presence of microplastics (MPs) in aquatic environments has become a significant concern, with freshwater sediments acting as terminal sinks, rapidly picking up these emerging anthropogenic particles. However, the accumulation, transport, degradation and biochemical impacts of MPs in freshwater sediments remain unresolved issues compared to other environmental compartments. Therefore, this paper systematically revealed the spatial distribution and characterization information of MPs in freshwater (rivers, lakes, and estuaries) sediments, in which small-size (<1 mm), fibers, transparent, polyethylene (PE), and polypropylene (PP) predominate, and the average abundance of MPs in river sediments displayed significant heterogeneity compared to other matrices. Next, the transport kinetics and drivers of MPs in sediments are summarized, MPs transport is controlled by the particle diversity and surrounding environmental variability, leading to different migration behaviors and transport efficiencies. Also emphasized the spatio-temporal evolution of MPs degradation processes and biodegradation mechanisms in sediments, different microorganisms can depolymerize high molecular weight polymers into low molecular weight biodegradation by-products via secreting hydrolytic enzymes or redox enzymes. Finally, discussed the ecological impacts of MPs on microbial-nutrient coupling in sediments, MPs can interfere with the ecological balance of microbially mediated nutrient cycling by altering community networks and structures, enzyme activities, and nutrient-related functional gene expressions. This work aims to elucidate the plasticity characteristics, fate processes, and potential ecological impact mechanisms of MPs in freshwater sediments, facilitating a better understanding of environmental risks of MPs in freshwater sediments.

关键词： Degradation Elemental cycles Freshwater sediments Plastics Transport

来源：评论

学校读者我要写书评

暂无评论

Benefit for inversion of long-term satellite daily temperature based on multi-machine learning algorithms

引用

Atmospheric Research 2025年 325卷

作者： Zhu, Xiaochen Jiao, Guanjie Li, Qiangyu Qiu, Rangjian Jiangsu Provincial University Key Laboratory of Agricultural and Ecological Meteorology School of Ecology and Applied Meteorology Nanjing University of Information Science and Technology Nanjing210044 China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control School of Environmental Science and Engineering Nanjing University of Information Science and Technology Nanjing210044 China Department of Natural Resources and the Environment University of Connecticut Storrs06269 United States State Key Laboratory of Water Resources Engineering and Management School of Water Resources and Hydropower Engineering Wuhan University Wuhan430072 China

The Advanced Very High-Resolution Radiometer (AVHRR), a satellite sensor has been in orbit for over 40 years, providing remote sensing images before 2000 and there is considerable room for improvement in the accuracy of current air temperature (Ta) inversions based on AVHRR to obtain accurate long-term Ta data before 2000. Here, we aim to estimate daily average (Tave), maximum (Tmax), and minimum (Tmin) air temperatures at a resolution of 5 km for the Chinese region during the period 1983–2000. We developed a satellite-retrieval daily temperature extrapolation method based on machine learning (ML) combining multiple sources of big data, i.e., leveraging comprehensive and gap-free land surface temperature data from remote sensing along with other relevant variables from reanalysis data, topography and auxiliary data of local temperature, to generate extended time series of high-resolution Ta data. Quality validation results indicate that the ML can enhance the accuracy of Ta inversion with average error range of various ML methods being 0.995–1.606 °C, 1.316–1.971 °C and 1.396–1.980 °C for Tave, Tmax, and Tmin, respectively, which is better than the 2.297 ± 1.704 °C, 3.294 ± 2.016 °C and 2.873 ± 1.666 °C of ERA5. Integrated ML method outperforms individual algorithms, yielding a high correlation coefficient of 0.96 and a robust mean error of 1 °C. The spatial distribution of newly daily Ta data from the multi-ML nationwide and local region is homogeneous with ERA5, indicating high physical consistency, and has higher resolution of 5 km. These updated temperature data can be beneficial in better revealing intricate structural attributes on a regional scale, as well as exploring urban heat islands. © 2024

关键词： Multi-task learning

来源：评论

学校读者我要写书评

暂无评论

Explainable Machine Learning Reveals the Unknown Sources of Atmospheric HONO during COVID-19

ACS ES&T Air

引用

ACS ES&T Air 2024年第10期1卷 1252-1261页

作者： Zhiwei Gao Yue Wang Sasho Gligorovski Chaoyang Xue LingLing Deng Rui Li Yusen Duan Shan Yin Lin Zhang Qianqian Zhang Dianming Wu School of Geographical Sciences East China Normal University Key Laboratory of Geographic Information Sciences Ministry of Education Shanghai 200241 China Institute of Eco-Chongming (IEC) Shanghai 202162 China State Key Laboratory of Organic Geochemistry and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control Guangzhou Institute of Geochemistry Chinese Academy of Science Guangzhou 510640 China Center for Excellence in Deep Earth Science Chinese Academy of Science Guangzhou 510640 China Max Planck Institute for Chemistry Mainz 55128 Germany Shanghai Environmental Monitoring Center Shanghai 200235 China Shanghai Yangtze River Delta Eco-Environmental Change and Management Observation and Research Station Ministry of Science and Technology Shanghai 200240 China Shanghai Urban Forest Ecosystem Research Station National Forestry and Grassland Administration Shanghai 200240 China Department of Atmospheric and Oceanic Sciences School of Physics Peking University Beijing 100871 China National Satellite Meteorological Center China Meteorological Administration Beijing 100081 China State Key Laboratory of Atmospheric Boundary Physics and Atmospheric Chemistry Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China

Nitrous acid (HONO) is a key precursor of the hydroxyl radical (•OH), playing an important role in atmospheric oxidation capacity. However, unknown sources of HONO (Punknown) are frequently reported and the potential sources are controversial. Here, we exploredPunknownduring COVID-19 in different seasons and epidemic control phases in Shanghai by eXtreme Gradient Boosting (XGBoost) and Shapley Additive Explanations (SHAP) for the first time. They demonstrated that the decrease of anthropogenic activity would inhibit secondary formation of HONO, as epidemic control policies turned strict. The explainable machine learning revealed that nitrogen dioxide (NO2) had significant impacts on thePunknownduring spring 2020 (P1), wherePunknowncould be fully explained by including light-induced heterogeneous conversion of NO2on ground, building, and aerosol surfaces. With the untightening of epidemic control in spring 2021 (P3), the HONO budget came to balance after further addition of the photolysis of particulate nitrate (NO3–) and soil HONO emission. As for P2 (summer),Punknowndecreased by 54% with all new sources added. These results provide new insights into HONO chemistry in response to reduced anthropogenic emissions, improving the predictions of atmospheric oxidation capacity.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Aquatic Environmental Fates and Risks of Benzotriazoles, Benzothiazoles, and P-Phenylenediamines in a Catchment Providing Water to a Megacity of China

SSRN

引用

SSRN 2022年

作者： Zhang, Ruiling Zhao, Shizhen Liu, Xin Tian, Lele Mo, Yangzhi Yi, Xin Liu, Shiyang Liu, Jiaqi Li, Jun Zhang, Gan State Key Laboratory of Organic Geochemistry Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou510640 China CAS Center for Excellence in Deep Earth Science Guangzhou510640 China Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization Guangzhou510640 China Anti-Drug Technology Center of Guangdong Province National Anti-Drug Laboratory Guangdong Regional Center Guangzhou510230 China Co. LTD Guangzhou510656 China University of Chinese Academy of Sciences Beijing100049 China

Wearing of vehicle parts could release many chemical additives into the environment, such as benzotriazoles (BTRs), benzothiazoles (BTHs), and p -phenylenediamines (PPDs), which are potentially toxic to wildlife and humans. This study investigates the occurrence, source, and risks of BTRs, BTHs, and PPDs in a source catchment providing water to Guangzhou, a megacity in South China, covering groundwater, surface water, and stormwater. The results showed that BTRs and BTHs were predominant in surface water and groundwater. Unexpectedly, the BTR and BTH concentrations were lower in surface water than groundwater in a third of the paired samples. For the first time, 6PPD-quinone, a toxic ozonation product of N -(1,3-dimethylbutyl)- N' -phenyl-1,4-phenylenediamine (6PPD), was extensively detected in source waters. Stormwater decreased the BTR concentrations but increased the 6PPD-quinone concentrations in surface water owing to their affiliation to suspended particles. From natural to urban segments of Liuxi river, a downstream increasing trend in BTR and BTH concentrations was observed, confirming that they are indicative of urban anthropogenic activities. Strong correlations between industrial activities and BTR or BTH concentrations in surface water indicated that industrial activities were their main sources. Six compounds were prioritized as potentially persistent, mobile, and toxic (PMT) chemicals, combing our monitoring results and REACH criterion. This study improves our understanding of the environmental fates and risks of water-soluble tire-wear chemicals, which provide important information for chemical management, and indicates attention should be paid to the risk posed by 6PPD-quinone in source water. © 2022, The Authors. All rights reserved.

关键词： Risk assessment

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：