4A

A guideline on facilitating " internet plus tourism ， " jointly that by 2025 , tourist attractions rated 4A or above are to be upgraded and become more intelligent in providing services .

文化和旅游部、国家发展改革委等十部门日前联合印发《关于深化“互联网+旅游”推动旅游业高质量发展的意见》。意见提出，到2025年，国家4A级及以上景区基本实现智慧化转型升级。

The Research and Practice on Blended Learning Model Based on 4A Platform

混合式学习在4A平台中的应用模式研究与实践

Unified identity management application in enterprise portal systems based on 4A technology

基于4A技术的统一身份管理在企业门户系统中的应用

Virtual 4A : Study on the Teaching Reform of Practical Course in Advertising

虚拟4A：广告学专业实务课程课堂教改探索

SOA Based Business Support 4A System Design

基于SOA架构的业务支撑网4A系统设计

Study on Synthesis and Application of 4A Zeolite Using Coal Fly Ash

粉煤灰合成4A沸石及应用研究

A study on spatial structure of national 4A grade tourism attractions in China

旅游吸引物空间结构分析&以中国首批国家4A级旅游区（点）为例

Propose a unified 4A security management platform based on the 4A theory .

在4A的技术理论之上，提出了统一的4A安全管理平台。

Zeolite 4A growth is the results of nano aggregation growth .

4A沸石晶体的长大是通过纳米聚合生长的结果。

Study on the three phase equilibria of ethanol water 4A molecular sieve

乙醇－水－4A分子筛体系三相平衡研究

Research on 4A Zeolite Made from Decomposition Liquor by Bayer Process

拜尔法分解母液生产4A沸石的研究

Preparation of 4A Molecular Sieve from Waste in Phosphate Fertilizer Production

利用磷肥生产废弃物制备4A分子筛

Study on the Synthesis Process of 4A Zeolite from Kaolin

4A沸石生成过程的研究

Influencing Factors for Hydrothermal Method Preparation of 4A Zeolite from Fly Ash

影响粉煤灰水热制备4A沸石的因素分析

Exploration on Manufacturing process of 4A Zeolite from Natural Zeolite

天然沸石制备4A沸石工艺探索

Influencing factors and synthesis mechanism of 4A zeolite molecular sieve by hydrothermal method

水热法合成4A沸石分子筛的影响因素及其合成机理

The effect of surfactants on stability of suspension of zeolite 4A in water

表面活性剂对4A沸石-水悬浮体稳定性的影响

4A zeolite for detergent applications made from Kaolinite in coal measures

煤系高岭岩制洗衣粉助剂4A沸石

The molecular geometry of 4a has been determined by a single crystal X-ray structure analysis .

解析了4a的X鄄射线单晶结构。

The preparation of zeolite 4A membrane can be as follows .

本文研究的对象是4A型分子筛膜。

The Redmi 4A was also launched at the conference .

此外，红米4A也在该发布会上正式发布。

The Preparation of 4A Molecular Sieve , a KInd of Adsorption Drying Agent

吸附干燥剂4A分子筛制备研究

The Crystal Growth . Procedure of 4A Zeolite Molecular Steve

4A沸石分子筛晶体生长过程

It is the National 4A Famous Scenic Sites and has a high tour development value .

它是国家4A级风景名胜区，有极大旅游开发价值。

On the Successful Road of College Students from " 4A " Theory in College Ideological and Political Education

从4A论看新时期高校思想政治教育中大学生的成才之路

Research of growth of 4A zeolite crystal for detergent

洗涤剂用4A沸石晶体生长过程的研究

Using the Fossil Waste Synthesize Ultrafine Zeolite 4A Through the Hydrothermal Method

利用矿物废料水热法制备超细4A分子筛

Experimental Investigations on the Vertical Pressing Filter in the Separation Process of 4A Zeolite

立式压滤机在4A沸石分离工序上的试验

4A zeolite can be used as backfill materials of radioactive waste materials treatment .

4A沸石可作为核废料处置库中缓冲材料的候选材料。

Breeding of Fine Quality CMS Line Yue 4A with a New Type of Cytoplasm

新质源优质不育系岳4A的选育与应用