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农作物 67 农业基础科学 45 植物保护 36
农学(农艺学) 19 植物学 18 环境污染及其防治 14
畜牧、动物医学、狩猎、蚕、蜂 11 经济学 10 考古学 9
环境科学基础理论 8 化学工业 7 园艺 7
天文学 6 昆虫学 6 分子生物学 5
教育学 5 民族学 5 管理学 5
中国文学 3 分析化学与药物化学 3 半导体材料 3
哲学 3 图书馆、情报与文献学 3 大气科学(气象学) 3
天文学::天体物理学 3 天文学::天体物理学::高能天体物理学 3 宗教学 3
政治学 3 林业 3 遗传学 3
Neurosciences & Neurology 2 化学 2 半导体物理 2
建筑科学 2 微生物学 2 核科学技术 2
社会学 2 考古学;考古学 2 轻工业、手工业、生活服务业 2
.Fission and Fusion Reactions; Radiation Measurements 1 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals;702.3 Solar Cells 1 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals;714.2 Semiconductor Devices and Integrated Circuits;741.1 Light/Optics;804.2 Inorganic Compounds;813.1 Coating Techniques;933.1.1 Crystal Lattice 1
701.1 Electricity: Basic Concepts and Phenomena;714.1 Electron Tubes;714.2 Semiconductor Devices and Integrated Circuits;741.1 Light/Optics;804 Chemical Products Generally 1 712.1 Semiconducting Materials - 714.2 Semiconductor Devices and Integrated Circuits - 741.1 Light/Optics 1 712.1.2 Compound Semiconducting Materials;741.1 Light/Optics;804 Chemical Products Generally 1
712.2 Thermionic Materials;714.1 Electron Tubes;741.1 Light/Optics 1 714.2 semiconductor devices and integrated circuits;731.1 control systems 1 741.1.2 Fiber Optics;741.3 Optical Devices and Systems;744.4 Solid State Lasers 1
741.1.2 Fiber Optics;744 Lasers 1 802 Chemical Apparatus and Plants; Unit Operations; Unit Processes;741.1 Light/Optics;548.2 Nickel Alloys;531.1 Metallurgy;804.1 Organic Compounds;462.2 Hospitals, Equipment and Supplies;461.8 Biotechnology;461.6 Medicine and Pharmacology;461.2 Biological Materials and Tissue Engineering;461.9.1 Immunology 1 802.2 Chemical Reactions - 804.1 Organic Compounds - 815.1 Polymeric Materials 1
921.5 Optimization Techniques;815.1.1 Organic Polymers;804.1 Organic Compounds;802.2 Chemical Reactions;801 Chemistry;717 Optical Communication;716 Telecommunication; Radar, Radio and Television;711 Electromagnetic Waves;701 Electricity and Magnetism;545.3 Steel;545.1 Iron 1 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments;943 Mechanical and Miscellaneous Measuring Instruments;942 Electric and Electronic Measuring Instruments;941 Acoustical and Optical Measuring Instruments;921.6 Numerical Methods;921 Mathematics;821.3 Agricultural Methods;723 Computer Software, Data Handling and Applications;714 Electronic Components and Tubes;706.1.1 Electric Power Transmission;706 Electric Transmission and Distribution;701.1 Electricity: Basic Concepts and Phenomena;402.4 Towers 1 951 Materials Science;812.3 Glass;804.2 Inorganic Compounds;804.1 Organic Compounds;804 Chemical Products Generally;802.3 Chemical Operations;801.4.1 Electrochemistry;813.1 Coating Techniques;931.2 Physical Properties of Gases, Liquids and Solids;931.3 Atomic and Molecular Physics;933 Solid State Physics;933.1.1 Crystal Lattice;942.2 Electric Variables Measurements;815.1.1 Organic Polymers;801.3 Colloid Chemistry;801 Chemistry;421 Strength of Building Materials; Mechanical Properties;462.4 Prosthetics;523 Liquid Fuels;546.2 Tin and Alloys;548.1 Nickel;548.2 Nickel Alloys;701.1 Electricity: Basic Concepts and Phenomena;712.1 Semiconducting Materials;712.1.2 Compound Semiconducting Materials;714.2 Semiconductor Devices and Integrated Circuits;741.1 Light/Optics;741.3 Optical Devices and Systems 1
951 Materials Science;933.1.2 Crystal Growth;933.1 Crystalline Solids;813 Coatings and Finishes;741.3 Optical Devices and Systems;714.2 Semiconductor Devices and Integrated Circuits;714 Electronic Components and Tubes;712 Electronic and Thermionic Materials;704 Electric Components and Equipment;701.1 Electricity: Basic Concepts and Phenomena;547.2 Rare Earth Metals 1 Agriculture 1 Agriculture; Biochemistry & Molecular Biology; Biodiversity & Conservation; Environmental Sciences & Ecology 1
Agriculture; Science & Technology - Other Topics; Reproductive Biology 1 Air Pollution; Magnetism: Basic Concepts and Phenomena 1 Behavioral Sciences 1
Biochemistry & Molecular Biology 1 Biochemistry & Molecular Biology; Cardiovascular System & Cardiology; Neurosciences & Neurology 1 Biochemistry & Molecular Biology; Cell Biology; Physics; Agriculture 1
Biochemistry & Molecular Biology; Endocrinology & Metabolism; Pharmacology & Pharmacy 1 Biochemistry & Molecular Biology; Microbiology; Genetics & Heredity 1 Biochemistry & Molecular Biology; Pediatrics; Virology; Genetics & Heredity; Infectious Diseases 1
Biodiversity & Conservation 1 Biomechanics, Bionics and Biomimetics; Dental Equipment and Supplies 1 Cell Biology; Toxicology 1
Chemical Operations;Safety Engineering; Physical Properties of Gases, Liquids and Solids 1 Computer Applications;High Energy Physics; Nuclear Physics; Plasma Physics 1 Computer Science; Environmental Sciences & Ecology; Plant Sciences 1
Computer Science; Public, Environmental & Occupational Health; Meteorology & Atmospheric Sciences; Environmental Sciences & Ecology 1 Concrete; Meteorology; Atmospheric Properties; Water Resources; Water Supply Systems; Biology; Soils and Soil Mechanics; Control Systems; Agricultural Methods; Agricultural Products 1 Concrete;Strength of Building Materials; Mechanical Properties; Aircraft, General;Mathematics 1
Concrete;Strength of Building Materials; Mechanical Properties; Computer Applications; Numerical Methods;Materials Science;Social Sciences 1 Construction Equipment and Methods; Surveying; Quality Assurance and Control; Probability Theory; Mathematical Statistics; Physical Properties of Gases, Liquids and Solids 1 Electricity: Basic Concepts and Phenomena; Atomic and Molecular Physics; High Energy Physics;.Particle Accelerators 1
Environmental Impact and Protection; Quality Assurance and Control;Mathematics;Systems Science 1 Environmental Sciences & Ecology 1 Environmental Sciences & Ecology; Engineering; Plant Sciences 1
Environmental Sciences & Ecology; Evolutionary Biology 1 Environmental Sciences & Ecology; Paleontology 1 Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Geology; Physics; Toxicology 1
Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Plant Sciences 1 Fluid Flow, General;Mathematics; Atomic and Molecular Physics 1 Genetics & Heredity; Pharmacology & Pharmacy; Reproductive Biology; Toxicology 1
Geriatrics & Gerontology; Oncology; Biochemistry & Molecular Biology; Genetics & Heredity 1 Geriatrics & Gerontology; Pharmacology & Pharmacy; Immunology; Rheumatology; Health Care Sciences & Services; Biochemistry & Molecular Biology 1 Geriatrics & Gerontology; Pharmacology & Pharmacy; Oncology; Hematology; Cardiovascular System & Cardiology; Pathology; Biochemistry & Molecular Biology; Demography 1
Geriatrics & Gerontology; Pharmacology & Pharmacy; Rheumatology 1 Heat Insulating Materials;Masonry Materials;Strength of Building Materials; Mechanical Properties;Computer Applications;Numerical Methods 1 Imaging Techniques;Mathematics;Acoustical and Optical Measuring Instruments;Materials Science;Electric and Electronic Measuring Instruments;Moisture, Pressure and Temperature, and Radiation Measuring Instruments; Temperature Measurements;Mechanical and Miscellaneous Measuring Instruments; Photography; Optical Devices and Systems;Buildings and Towers;Strength of Building Materials; Mechanical Properties; Atmospheric Properties;Space Physics; Extraterrestrial Physics and Stellar Phenomena;Light, Optics and Optical Devices 1
Immunology; Transplantation 1 Immunology; Virology; Infectious Diseases; Pediatrics 1 Light/Optics;Chemistry; Mathematical Statistics; Atomic and Molecular Physics; High Energy Physics 1
Maritime and Port Structures; Rivers and Other Waterways; Waterways; Water Resources; Surface Water; Soil Mechanics and Foundations; Soils and Soil Mechanics; Hydraulics; Computer Applications; Chemistry; Chemical Products Generally; Mathematics; Mathematical Statistics; Physical Properties of Gases, Liquids and Solids; Materials Science 1 Materials Science; Mechanical Variables Measurements;Chemical Products Generally; Chemical Reactions; Physical Chemistry;Gas Fuels;Soil Mechanics and Foundations 1 Materials Science; Moisture Measurements; Electric Variables Measurements;Chemistry; Specific Variables Control; Soils and Soil Mechanics; Geology; Water Analysis;Water Resources; Structural Members and Shapes;Buildings and Towers 1
Materials Science; Numerical Methods;Mathematics; Control Instrumentation; Computer Programming; Strength of Building Materials : Test Methods;Strength of Building Materials; Test Equipment and Methods;Strength of Building Materials; Mechanical Properties;Buildings and Towers 1

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