===================================================

Inorganic Chemistry, 3e



无机化学，第三版
作者：Gary L. Miessler, St. Olaf College
Donald A. Tarr, St. Olaf College
ISBN：0131201980
出版年代：2004
页码：720
装帧:Softcover

出版社： Pearson Education
外币原价：HKD 270
教师单本订购价：￥200.00

使用情况中国海洋大学、湖南大学
内容简介
This highly readable text provides the essentials of Inorganic Chemistry at a level that is neither too high (for novice students) nor too low (for advanced students). It has been praised for its coverage of theoretical inorganic chemistry. It discusses molecular symmetry earlier than other texts and builds on this foundation in later chapters. Plenty of supporting book references encourage instructors and students to further explore topics of interest.
主要章节
1. Introduction to Inorganic Chemistry.
2. Atomic Structure.
3. Simple Bonding Theory.
4. Symmetry and Group Theory.
5. Molecular Orbitals.
6. Acid-Base and Donor-Acceptor Chemistry.
7. The Crystalline Solid State.
8. Chemistry of the Main Group Elements.
9. Coordination Chemistry I: Structures and Isomers.
10. Coordination Chemistry II: Bonding.
11. Coordination Chemistry III: Electronic Spectra.
12. Coordination Chemistry IV: Reactions and Mechanisms.
13. Organometallic Chemistry.
14. Organometallic Reactions and Catalysis.
15. Parallels Between Main Group and Organometallic Chemistry.
16. Bioinorganic and Environmental Chemistry.
Appendixes.





=============================================================


Contemporary Polymer Chemistry, 3e

现代聚合物化学，第三版

作者：Harry Allcock, Pennsylvania State University

Fred Lampe, Deceased, Pennsylvania State University
James Mark, University of Cincinnati
ISBN：0131911597
出版年代：2004
页数：832
装帧:
Paperback
出版社：Pearson Education

外币原价：

教师单本订购价：￥200.00


内容简介
A complete overview of the synthetic, kinetic, structural, and applied aspects of modern polymer chemistry, this text clearly illustrates the relationship between fundamental chemistry and the uses of polymers. Polymer Chemistry, featuring new co-author James Mark, also provides coverage of industrial and medical applications. Many of the study questions give answers or require thoughtful utilization of the text material.


主要章节
I. SYNTHESIS AND REACTIONS OF POLYMERS.

1. The Scope of Polymer Chemistry.
2. Condensation and Other Step-Type Polymerizations.
3. Free-Radical Polymerization.
4. Ionic and Coordination Polymerization.
5. Photolytic, Radiation, and Electrolytic Polymerization.
6. Polmerization of Cyclic Organic Compounds.
7. Reactions of Synthetic Polymers.
8. Biological Polymers and Their Reactions.
9. Inorganic Elements in Polymers.
II. THERMODYNAMICS AND KINETICS OF POLYMERIZATION.
0. Polymerization and Depolymerization Equilibria.
11. Kinetics of Condensation (Step-Growth) Polymerization.
12. Kinetics of Free-Radical Polymerization.
13. Kinetics of Ionic Polymerization.
III. PHYSICAL CHARACTERIZATION OF POLYMERS.
14. Determination of Absolute Molecular Weights.
5. Secondary Methods for Molecular Weight Determination.
16. Thermodynamics of Solutions of High Polymers.
17. Morphology, Glass Transitions, and Polymer Crystallinity.
18. Conformational Analysis of Polymers.
19. X-Ray Diffraction by Polymers.
IV. FABRICATION AND TESTING OF POLYMERS.
20. Fabrication of Polymers.
21. Testing of Polymers.
V. MOLECULAR STRUCTURE, PROPERTIES, AND USES.
22. General Structure-Property Relationships.
23. Electroactive Polymers.
24. Biomedical Applications of Synthetic Polymers.
VI. APPENDICES.
I. Polymer Nomenclature.
II. Properties and Uses of Selected Polymers.
III. References to Topics not Discussed in this Book.
Author Index.
Subject Index.
======================================================================

Chemistry: The Central Science: International Edition, 10/e
化学：中心科学，第十版（国际版）

作者：Theodore E Brown
H. Eugene LeMay
Bruce E Bursten

ISBN:
0132017172

出版年代：2005
页码：1248

装帧:
软皮（国际版）
出版社：
Pearson Education- Prentice Hall
外币原价：$154.00 教师单本订购价：￥335.00

使用情况
哈佛、加州大学等全美超过600所大学使用。
内容简介
作为全球最受欢迎的普通化学教材之一，本书已经畅销20多年。作者是伊利诺伊大学的资深教授，集结多年教学经验，全力打造的经典著作。本书内容详实、叙述严谨清晰，强调科学的准确性，配有大量动画演示课件和教辅支持材料。适用于普通化学2学期课程使用。

主要章节
1. Introduction: Matter and Measurement.
2. Atoms, Molecules, and Ions.
3. Stoichiometry: Calculations with Chemical Formulas and Equations.
4. Aqueous Reactions and Solution Stoichiometry.
5. Thermochemistry.
6. Electronic Structure of Atoms.
7. Periodic Properties of the Elements.
8. Basic Concepts of Chemical Bonding.
9. Molecular Geometry and Bonding Theories.
10. Gases.
11. Intermolecular Forces, Liquids, and Solids.
12. Modern Materials.
13. Properties of Solutions.
14. Chemical Kinetics.
15. Chemical Equilibrium.
16. Acid-Base Equilibria.
17. Additional Aspects of Equilibria.
18. Chemistry of the Environment.
19. Chemical Thermodynamics.
20. Electrochemistry.
21. Nuclear Chemistry.
22. Chemistry of the Nonmetals.
23. Metals and Metallurgy.
24. Chemistry of Coordination Compounds.
25. The Chemistry of Life: Organic and Biological Chemistry.
======================================================
Physical Chemistry, 3e
物理化学, 第三版


作者：Robert Silbey, Robert Alberty
ISBN：0471383112 页码：980
出版年代：2000
装帧: Hardback
出版社：John Wiley
外币原价：$120.95
使用情况
斯坦福大学

内容简介
Physical Chemistry, Third Edition is intended for a standard undergraduate physical chemistry course taken by chemistry majors, chemical engineers, and biochemists in their junior/senior year. Silbey/Alberty has been a leading book for this course for 80 years. The book features exceptionally clear explanations of the concepts and methods of physical chemistry. This revision combines an emphasis on problem-solving, with enhanced pedagogy and technology integration. 136 new Mathematica problems have been added to this edition to accomplish this.

主要章节
THERMODYNAMICS.
Zeroth Law of Thermodynamics and Equations of State.
First Law of Thermodynamics.
Second and Third Laws of Thermodynamics.
Fundamental Equations of Thermodynamics.
Chemical Equilibrium.
Phase Equilibrium.
Electrochemical Equilibrium.
Ionic Equilibria and Biochemical Reactions.
QUANTUM CHEMISTRY.
Quantum Theory.
Atomic Structure.
Molecular Electronic Structure.
Symmetry.
Rotational and Vibrational Spectroscopy.
Electronic Spectroscopy of Molecules.
Magnetic Resonance Spectroscopy.
Statistical Mechanics.
KINETICS.
Kinetic Theory of Gases.
Experimental Kinetics and Gas Reactions.
Chemical Dynamics and Photochemistry.
Kinetics in the Liquid Phase.
MACROSCOPIC AND MICROSCOPIC STRUCTURES.
Macromolecules.
Electric and Magnetic Properties of Molecules.
Solid-State Chemistry.

[ Last edited by cc136520 on 2007-12-3 at 13:45 ]

============================================
Introduction to Organic Chemistry, 3rd Edition
有机化学导论，第三版=

作者: William H Brown, Thomas Poon
ISBN: 0471451614
装帧:: Hardcover
页数: 736
年代: 2004
目录价: US$116.95
出版社: John Wiley & Sons
教师单本订购价：￥328.00

内容简介
This new edition emphasizes the interrelation between organic chemistry and the biological and health sciences. The organization and presentation of topics within the text allows readers to make connections between what they’ve learned previously, and what will be covered later. Applications are integrated throughout the chapters that highlight the connections between organic chemistry and the real world. This connectivity and logical development of topics helps anyone overcome their fear of organic chemistry.


This book enables readers to see the connections in organic chemistry and understand the logic.

·
Reaction mechanisms are grouped together to reflect logical relationships.
·
Discusses organic chemistry as it is applied to real-world compounds and problems.
·
Electrostatic potential plots are added throughout the text to enhance the recognition and importance of molecular polarity.
·
Presents problems in a new “Looking-Ahead” section at the end of each chapter that show how concepts constantly build upon each other.
·
Converts many of the structural formulas to a line-angle format in order to make structural formulas both easier to recognize and easier to draw.

主要章节

1.Covalent Bonding and Shapes of Molecules
2.Acids and Bases
3.Alkanes and Cycloalkanes
4.Alkenes and Alkynes
5.Reactions of Alkenes
6.Chirality and the Handedness of Molecules
7.Haloalkanes
8.Alcohols, Ethers, and Thiols
9.Benzene and its Derivatives
10.Amines
11.Infrared Spectroscopy
12.Nuclear Magnetic Resonance Spectroscopy
13.Aldehydes and Ketones
14.Carboxylic Acids
15.Functional Derivatives of Carboxylic Acids
16.Enolate Anions
17.Organic Polymer Chemistry
18. Carbohydrates
19. Amino Acids and Proteins
20. Nucleic Acids
21. Lipids
22. The Organic Chemistry of Metabolism


===============================================
March's Advanced Organic Chemistry: Reactions, Mechanisms, and Structure, 5e

高等有机化学
第五版作者：Michael B. Smith, Professor of Chemistry University of Connecticut
Jerry March,
Professor in the Department of Chemistry at Adelphi University
ISBN：0471585890出版年代：2000
页数：2112
装帧: Hardback

出版社：John Wiley
外币原价：$74.95 教师单本订购价：￥350.00
使用情况
本书被美国的维吉尼亚大学，康涅狄格大学

新版特点
l
第五版为Michael Smith与多位专家倾力合著而成
l
参考文献达20000多篇，其中5000篇为全新的参考资料
l
比前一版增加40个全新章节，涵盖了有机化学领域内的最新、最重要的研究内容
l
更新了大量分子结构图

主要章节
PART 1.
Localized Chemical Bonding.
Delocalized Chemical Bonding.
Bonding Weaker than Covalent.
Stereochemistry.
Carbocations, Carbanions, Free Radicals, Carbenes, and Nitrenes.
Mechanisms and Methods of Determining Them.
Photochemistry.
Acids and Bases.
Effects of Structure on Reactivity.
PART 2.
Aliphatic Electrophilic Substitution.
Aromatic Nucleophilic Substitution.
Free-Radical Substitution.
Addition to Carbon-Carbon Multipe Bonds.
Addition to Carbon-Hetero Multipe Bonds.
Eliminations.
Rearrangements.
Oxidations and Reductions.
Appendix A: The Literature of Organic Chemistry.
Appendix B: Classification of Reactions by Type of Compound Synthesized.
===============================================


Chemistry and Chemical Reactivity(ISE with General Chemistry Now CD-ROM )，6e



化学与化学反应，第六版

作者：John C. Kotz, State University of New York, Oneonta
Paul M. Treichel, University of Wisconsin, Madison
Gabriela C. Weaver, Purdue University

ISBN：0495010359
出版年代：2006
页码：1322



出版社：BrooksCole
外币原价：$ 146.95 教师单本订购价：￥415.00











内容简介



CHEMISTRY AND CHEMICAL REACTIVITY has been revised to help students get to a higher level of understanding of General Chemistry-concepts. This revision includes General ChemistryNow, a new CD-ROM and web-based learning system that focuses on goals, connections, and complete integration with the text.

主要章节




Part 1: THE BASIC TOOLS OF CHEMISTRY.
1. Matter and Measurement.
2. Atoms and Elements.
3. Molecules, Ions, and Their Compounds.
4. Chemical Equations and Stoichiometry.
5. Reactions in Aqueous Solution.
6. Principles of Reactivity: Energy and Chemical Reactions.
Interchapter: THE CHEMISTRY OF FUELS AND ENERGY SOURCES.
Part 2: THE STRUCTURE OF ATOMS AND MOLECULES.
7. Atomic Structure.
8. Atomic Electron Configurations and Chemical Periodicity.
9 Bonding and Molecular Structure: Fundamental Concepts.
10. Bonding and Molecular Structure: Orbital Hybridization and Molecular Orbitals.
11. Carbon: More than Just Another Element.
Interchapter: THE CHEMISTRY OF LIFE: BIOCHEMISTRY.
Part 3: STATES OF MATTER.
12. Gases and Their Properties.
13. Intermolecular Forces, Liquids, and Solids.
Interchapter: THE CHEMISTRY OF MODERN MATERIALS.
14. Solutions and Their Behavior.
Part 4: THE CONTROL OF CHEMICAL REACTIONS.
15. Principles of Reactivity: Chemical Kinetics.
16. Principles of Reactivity: Chemical Equilibria.
17. Principles of Reactivity: Chemistry of Acids and Bases.
18. Principles of Reactivity: Other Aspects of Aqueous Equilibria.
19. Principles of Reactivity: Entropy and Free Energy.
20. Principles of Reactivity: Electron Transfer Reactions.
Interchapter: THE CHEMISTRY OF THE ENVIRONMENT.
Part 5: THE CHEMISTRY OF THE ELEMENTS.
21. The Chemistry of the Main Group Elements.
22. The Chemistry of the Transition Elements.
23. Nuclear Chemistry.
Appendices:
A. Using Logarithms and the Quadratic Equation.
B. Some Important Physical Concepts.
C. Abbreviations and Useful Conversion Factors.
D. Physical Constants.
E. Naming Organic Compounds.
F. Values for the Ionization Energies and Electron Affinities of the Elements.
G. Vapor Pressure of Water at Various Temperatures.
H. Ionization Constants for Weak Acids at 25º C.
I. Ionization Constants for Weak Bases at 25º C.
J. Solubility Product Constants for Some Inorganic Compounds.
K. Formation Constants for Some Complex Ions in Aqueous Solution.
L. Selected Thermodynamic Values.
M. Standard Reduction Potentials in Aqueous Solution at 25º C.
N. Answers to Exercises.
O. Answers to Selected Study Questions.
P. Answers to Selected Chemistry of? Study Questions.

======================================================
General Chemistry (with CD-ROM and InfoTrac) 7e
普通化学，第七版



作者：Kenneth W. Whitten, University of Georgia



Raymond E. Davis, University of Texas



Larry M. Peck, Texas A&M University



George G. Stanley, Louisiana State University


ISBN：0534408605


出版年代：2004
页数：152.95


出版社：BrooksCole
外币原价：$152.95

教师单本订购价：￥425.00

使用情况


内容简介
This best-selling text, GENERAL CHEMISTRY by Whitten/Davis/Peck/Stanley, is best summarized by "classic text, modern presentation." This simple phrase underlies its strong emphasis is on fundamental skills and concepts. As in previous editions, clearly explained problem-solving strategies continue to be the strength of this student-friendly text. This revision builds on the highly praised style and applications to everyday life that have earned this text a reputation as the voice of authority in general chemistry.

Whitten always has been viewed as one of the few truly "traditional" general chemistry texts. Examples of this are that the text covers Thermodynamics, normally a topic split into two parts and covered in two different semesters, in one chapter and begins the second half of the course. GENERAL CHEMISTRY, Seventh Edition also follows a standard narrative-example-problem format, has a solid traditional writing style, and promotes problem solving. However, the authors have added some new elements over the years to reflect changes in chemical education. These include adding in conceptual questions in the problem sets, adding features like the Chemistry In Use boxes to show how chemistry is used in daily life, and further promoting problem solving by including hints and checks for students

主要章节






1. The Foundations of Chemistry.
2.Chemical Formulas and Composition Stoichiometry.
3. Chemical Equations and Reaction Stoichiometry.
4. Some Types of Chemical Reactions.
5. The Structure of Atoms.
6. Chemical Periodicity.
7. Chemical Bonding.
8. Molecular Structure and Covalent Bonding Theories.
9. Molecular Orbitals in Chemical Bonding.
10. Reactions in Aqueous Solutions I: Acids, Bases, and Salts.
11. Reactions in Aqueous Solutions II: Calculations.
12. Gases and the Kinetic-Molecular Theory.
13. Liquids and Solids.
14. Solutions.

15. Chemical Thermodynamics.
16. Chemical Kinetics.
17. Chemical Equilibrium.
18. Ionic Equilibria I: Acids and Bases.
19. Ionic Equilibria II: Buffers and Titration Curves.
20. Ionic Equilibria III: The Solubility Product Principle.
21. Electrochemistry.
22. Metals I: Metallurgy.
23. Metals II: Properties and Reactions.
24. Some Nonmetals and Metalloids.
25. Coordination Compounds.
26. Nuclear Chemistry.
27. Organic Chemistry I: Formulas, Names, and Properties.
28. Organic Chemistry II: Shapes, Selected Reactions, and Biopolymers.



===============================================   
Organic Chemistry：Structure and Function，3e
有机化学：结构与功能 第三版

作者：Vollhardt, K. Peter C.; Schore, Neil E.
ISBN：0716727218
出版年代：1998
页数: 1300
装帧: Paperback
出版社：W H Freeman
外币原价：$132.10
教师单本订购价：￥275.00

内容简介
The third edition of this text includes new material and pedagogical aids. It covers structure before function, introducing stereochemistry and spectroscopy early on, with an emphasis on important reactions. There is an accompanying CD-ROM with animations, simulations and exercises.

主要章节
Structure and Bonding in Organic Molecules
Alkanes
Reactions of Alkanes
Cyclic Alkanes
Stereoisomers
Properties and Reactions of Haloalkanes
Further reactions of Haloalkanes
Hydroxy Functional Group
Further Reactions of Alcohols and the Chemistry of Ethers
Using Nuclear Magnetic Resonance Spectroscopy to Deduce Structure
Alkanes and Infrared Spectroscopy
Reactions of Alkanes
Alkynes
Delocalized Pi Systems
Unusual Stability of the Cyclic Electron Sextet
Electrophilic Attack on Derivatives of Benzene
Aldehydes and Ketones
Enols and Enones
Carboxylic Acids
Carboxylic Acid Derivatives and Mass Spectrometry
Amines and Their Derivatives
Chemistry of Benzene Substituents
Ester Enolates and Acyl Anion Equivalents
Carbohydrates
Heterocycles
Amino Acids, Peptides, Proteins, and Nucleic Acids

==================================================

Chemistry：Molecules, Matter and Change with CD-ROM, 4e



化学：分子，物质与变化  第四版



作者：Loretta Jones
(U. of Northern Colorado)
Peter Atkins
(Lincoln College, Oxford U.)
ISBN：0716742578
出版年代：2001
页码：880
装帧:Hardback
出版社： W H Freeman
外币原价：$76.00
教师单本订购价：￥275.00

内容简介

As authors, Loretta Jones and Peter Atkins set their sights on teaching students how to see the world in chemical terms. Their books are designed to help students:
see everyday objects--a flower, a rock--as three-dimensional molecular structures (visualization)
quantify with numbers and equations what happens when a reaction such as bringing water to boil occurs (problem solving)
understand what chemistry reveals about various aspects of everyday life, such as a visit to a drugstore (applications).

The new edition of Chemistry: Molecules, Matter, and Change is the most effective yet at helping students develop their visualization and problem solving skills, and showing the practical impact of chemical understanding on the way we live. The change in the author order on the book (Jones before Atkins) reflects the growing emphasis on connecting the concepts of visualization, problem solving, and applications in the classroom; a number of new features in the text work specifically to strengthen the emphasis on these three crucial concepts. Accompanying the text is a complete, media-enhanced supplements package.






主要章节


Matter; measurements and moles; chemical reactions; reaction stoichiometry - chemistry's accounting.
Connection 1 Chemistry in the drugstore: the properties of gases; thermochemistry - the fire within; atomic structure and the Periodic Table; chemical bonds; molecular structure.
Connection 2 Finding energy for the future: liquids and solids; carbon-based materials; the properties of solutions. Connection 3 Sport drinks: the rates of reactions; chemical equilibrium; acids and bases; aqueous equilibria.
Connection 4 What's in our water: the direction of chemical change; electrochemistry.
Connection 5 Electric cars: the main group elements – the first four main groups; the main group elements - the last four main groups; the d-block - metals in transition; nuclear chemistry.

Connection 6 Terraforming Mars，

======================================
Chemical Principles:The Quest for Insight,3rd
化学原理，第3版
作者：Peter Atkins ( Oxford University)
Loretta Jones (University of Northern Colorado)
ISBN：071675701X

出版年代：2004
页数：          装帧：
Hardback
出版社：WH Freeman
外币原价： £39.99
教师单本订购价：$400.0


使用情况
武汉大学

内容简介
Written for calculus-based general chemistry courses, particularly honours-level or accelerated courses, Chemical Principles helps students develop chemical insight by showing the connections between fundamental chemical ideas and their applications. Unlike other texts, it begins with a detailed picture of the atom then builds toward chemistry's frontier, continually demonstrating how to solve problems, think about nature and matter, and visualize chemical concepts in the same ways as working chemists. The new edition incorporates features that extend the book's emphasis on modern techniques and applications while strengthening its problem-solving approach. Atkins/Jones is the only book for this course featuring integrated book-specific media that provides students with effective study help via a variety of electronic tools.
主要章节
Fundamentals
The Quantum World
Chemical Bonds
Molecular Shape and Structure
The Properties of Gases
Liquids and Solids
Thermodynamics: The First Law
Thermodynamics: The Second and Third Laws
Physical Equilibria
Chemical Equilibria
Acids and Bases
Aqueous Equilibria
Electrochemistry
Chemical Kinetics
The Elements: The First Four Main Groups
The Elements: The Last Four Main Groups
The d Block: Metals in Transition
Nuclear Chemistry
Organic Chemistry I: The Hydrocarbons
Organic Chemistry II: Functional Groups



==========================================
Physical Chemistry
物理化学
作者：Thomas Engel
ISBN：080533842X
出版年代：2006
页数：1000
装帧: HARD BOUND BOOK

出版社：Pearson Education
外币原价：$99.00教师单本订购价：￥300.00

使用情况
NEW JERSEY CITY UNIV，PRINCETON UNIVERSITY，UNIVERSITY OF WASHINGTON，UNIVERSITY OF MISSISSIPPI等几十所世界著名高校。
内容简介
本书为四色印刷教材，在一定深度上集中讲述了基本原理、基本应用及当代研究成果中的核心概念。作者在关键概念的解释上强调彻底和细节，而反对百科全书式的笼统。本书在内容上避免了过多数学概念，以便能给学生提供更为清晰的解释并让学生集中于理解最重要的概念上。

主要章节



Chapter 1: Fundamental Concepts of Thermodynamic
Chapter 2: Heat, Work, Internal Energy, Enthalpy, and the First Law of Thermodynamics
Chapter 3: The Importance of State Functions: Energy and Enthalpy
Chapter 4: Thermochemistry
Chapter 5: Entropy and the Second and Third Laws of Thermodynamics
Chapter 6: Chemical Equilibrium
Chapter 7: Real Gases and Ideal Gases
Chapter 8: Phase Diagrams and the Relative Stability of Solids, Liquids, and Gases
Chapter 9: Ideal and Real Solutions
Chapter 10: Electrolyte Solutions
Chapter 11: Electrochemical Cells, Batteries, and Fuel Cells
Chapter 12:  From Classical to Quantum Mechanics
Chapter 13: The Schrödinger Equation
Chapter 14: The Quantum Mechanical Postulates
Chapter 15:  Using Quantum Mechanics on Simple Systems
Chapter 16: The Particle in the Box and the Real World
Chapter 17: Commuting and Noncommuting Operators and the Surprising Consequences of Entanglement
Chapter 18:  A Quantum Mechanical Model for the Vibration and Rotation of Molecules
Chapter 19: The Vibrational and Rotational Spectroscopy of Diatomic Molecules
Chapter 20: The Hydrogen Atom
Chapter 21: Many-Electron Atoms
Chapter 22: Examples of Spectroscopy Involving Atoms
Chapter 23: Chemical Bonding in H+2  and H2
Chapter 24: Chemical Bonding in Diatomic Molecules
Chapter 25: Molecular Structure and Energy Levels for Polyatomic Molecules
Chapter 26: Electronic Spectroscopy
Chapter 27: Computational Chemistry
Chapter 28: Molecular Symmetry
Chapter 29: Nuclear Magnetic Resonance Spectroscopy
Chapter 30: Probability
Chapter 31: The Boltzmann Distribution
Chapter 32: Ensemble and Molecular Partition Functions
Chapter 33: Statistical Thermodynamics
Chapter 34: Kinetic Theory of Gases
Chapter 35: Transport Phenomena
Chapter 36: Elementary Chemical Kinetics

看了也没啥   这种类似的教材在小木虫都能看到

还是要顶一下！