签证都是有什么材料？
其实这个没有统一答案，因为不同国家的签证需要准备的材料不一样！ 就拿中国申请去美国的留学签证来说吧，一般有如下几种： 1、护照（有效期超过6个月）+旧护照； 2、DS-160申请表确认页及156和157两份表格； 3、48×35mm的白底正面免冠彩照2张； 4、身份证原件+复印件； 5、全家户口本整本复印件； 6、大学正式本科成绩单原件及中英对照公证书原件、毕业证明原件和中英对照公证书原件; 7、财力证明：存款证明原件、活期或定期存折原件及复印件+对账单、信用卡对账单（如有）、房产证/车辆行驶证等； 8、录取通知书或者邀请函的原件以及复印件； 9、简历表； 10、面试指导课程（如被预约面试）；
下面我们重点来看一下美国留学面签时可能会问的问题有哪些？
1、Why do you want to go to school in the United States？ 你为什么想去美国读书呢？
答：这是关于你去美国学习目的的一个问题。 你可以这样来回答这个问题： “I would like to major in engineering because it is a field which I am very interested. The U.S. is an advanced country， especially in such fields as technology and science research so there must be more opportunities for me to improve my knowledge here than at home.” 如果您选择的是一所私立学校那么可以这样说： “I plan on going to a private university since many of these universities provide financial aid， either scholarships or loans. So this way i can have enough money both for education and living while studying in the USA. ” “Besides，America’s educational resources are well developed， with all kinds of excellent facilities which we usually lack in China. Moreover，i will live with my aunt whose husband works over there now. She could give me much help if i meet any difficulties during study. Finally， America has its own different culture from that in china. It will offer me a good opportunity to know about other cultures. For example，people often believe they should lead independent lives. They don’t care what others think about them. To learn more about western life will change not only my thinking but also my personality. All these experiences will benefit me greatly when i return to work after graduation.” 在上述回答中，申请者表明了学习的兴趣所在，并说明在美国能够学到更多知识的原因，同时还解释了为什么要去私人院校求学。
最后还进一步解释了自己的出国原因——得到良好的教育和接受多种文化的熏陶。这些都是签证官想要听到的答案哦~！ 如果申请人是赴美读研的话还要补充一点内容哟～！那就是要介绍自己以前的学习情况与专业背景啦！可以这样说： “My GPA is high enough for college graduate studies， and besides，it seems quite important for students who wish to continue their master degree in engineering area in US. Therefore， getting admission into your university would enable me realize my dream of becoming a famous engineer someday.” 在这里请注意在陈述GPA的时候最好用数字而不是百分比形式来表达。