证明材料一般出自有关单位，文字应规范、严谨，并加盖有效印章。申请者应提供的证明材料主要有以下几种： (来源：英语聊天室 http://chat.EnglishCN.com)

            　　1学历、学位证明，主要是大学、研究生毕业证书，硕士学位证书，博士学位证书；

            　　2.成绩单，成绩单是任何申请人都必须提供的，我国大专院校的成绩评定大多采用百分制，而美国则以采用等级制为多，其平均值通常用平均成绩点数（GPA）表示，因此，必须注明所采用的记分方法，最好能提自己在班级所排名次，现在，美国大多数学校都要求申请者通过ETS直接提供TOEFL或GRE成绩：

            　　3.财力证明；

            　　4.体检表和健康证明，一般应由指定级别的医院出具；

            　　5.学业（术）奖励和工作证明，一般学校尽管不作要求，但获得过奖励和有过实际工作经验的申请者，在录取时必定会得到优先考虑，这一点在申请助教、助研及奖学金时尤为重要。

            　　范例1.大学毕业证书

            　　Let it be known that Mr. Wang Chumming, native of Shandong
            Province, born on January 17, 1962, having specialized in
            seismological geology in the Geology Department of Changchun
            University from October, 1978 to July, 1982 and having completed the

            four year undergraduate program with qualified standing, is hereby
            awarded this Certificate of Graduation.

            　　范例2.研究生毕业证书

            　　Mr. Kang Jiangrong was born in Hangzhou, Zhejiang Province in
            April, 1968. From September 1985 to December 1989, he was a
            postgraduate student in our institute, majoring in Textile
            Machinery,
            He fulfilled his study plan, and passed oral examination on his
            thesis in July 1989. He was allowed to graduate.

            　　范例3.硕士学位证书

            　　Certificate of Master Degree University of Shanghai

            　　We the undersigned hereby certify that Mr. Jiang Shan having
            fulfilled the requirements of the Ordinances and Regulations of the
            University was by the University authority admitted to the Degree of

            Master of Science in Electronic Engineering at a Congregation held
            in
            the University on July 14, 1989.

            　　范例4.国家教委出具的公费留学财力证明

            　　PEOPLE'S REPUBLIC OF CHINATO Whom It May Concern:This is to
            certify that Mr. Wan Li, born, June 17, 1960, a native of People's
            Republic of China, graduated from Tsinghua University, and he has
            been awarded a government scholarship by this commission for
            studying
            abroad.The scholarship is for two academic years. covering his / her

            living costs, full tuition required by the host university, round
            trip travelling expenses, as well as other miscellaneous fees.The
            money will be given directly to M, who is then responsible for the
            payment of fees to the university.Any assistance and advice you may
            render to M during his / her study tour will be highly
            appreciated.DirectorBureau of International Cultural and Educational

            Relations

            　　范例5.健康证明书

            　　TO WHOM IT MAY CONCERN:This is to certify that Mr. Lin Chonghan
            is physically and mentally healthy. This statement is based on his
            health history and a physical checkup. My observation of his health
            condition is that he is capable of doing extensive hard work, both
            manually and intellectually.Sincerely yours,
            　　Dept. Of Internal MedicinePost Hospital

            　　范例6.工作证明

            　　INDUSTRIAL DEVELOPMENT BUREAU MINISTRY OF ECONOMIC AFFAIRSJuly
            11, 1986To Whom It May Concern,This is to certify that Mr. Shu duly
            passed the qualification examination as a Mechanical Engineer and
            has
            been granted a certificate, Taikong No. 6314 dated February 3, 1982
            to this effect by the Ministry of Economic Affairs.Particulars of
            the
            certificate follow:Name: ShuNative Place: Sichuan ProvinceDate of
            Birth: November, 1955Classification : Mechanical
            EngineeringSincerely
            yours,K. A. WangDirector General

            　　范例7.参加学会、社团证明

            　　TO WHOM IT MAY CONCERN:This is to certify that Mr. Liang is a
            member of IEMC (Institute of Education for Mass Communication) since

            1982.To the best of my knowledge, Mr. liang has been a senior
            lecturer teaching in the Dept. of Mass Communication, Beijing
            University since the beginning of 1984. He is also teaching some
            courses in Joint College.I would like to mention that Mr. Liang is
            responsible. aggressive and gets along with his colleagues very
            well.
            Hence, he also demonstrates superior scholastic capacity and his
            potential for further academic growth.If there is any information
            regarding this gentleman, please do no hesitate to let me know.Best
            Regards.

            　　范例8.职称证书

            　　INSTRUCTOR'S LICENCEDate: Feb., 1984File No. Jiangzi 19045This is
            to certify that Mr. Cheng Qin, a native of Chengdu City, China, born

            on March 26, 1966, has been qualified for instructorship pursuant to

            Teacher's Qualification Regulations of Colleges and
            Universities.Minister of Education:Submitting School: Sichuan
            College
            of Technology

            　　范例9.大学获奖证明

            　　Tsinghua UniversityNO. 742821 November 22, 1985TO WHOM IT MAY
            CONCERN:This is to certify that Miss Liu a senior student in our
            Department of International Trade College of Law, received four
            times
            the Book Coupon Awards, which only students among the top five
            percent are entitled to present.