【正文】 問簽證的有效期和停留期都是3個(gè)月，即在3個(gè)月內(nèi)入境方為有效，入境后也只能停留3個(gè)月。有效次數(shù)簽證除了有效期、停留期之外，還規(guī)定有效次數(shù)。出、入境簽證根據(jù)出入境情況，簽證分為出境簽證、入境簽證、出入境簽證以及再入境簽證四種。不少國家規(guī)定，凡取道該國進(jìn)入第三國的外國人，不論停留時(shí)間長短，一律需要辦理簽證。強(qiáng)烈不建議利用這種方法入境香港而不去國外。D類(TypeD)：此類簽證原則上只允許進(jìn)入簽證中注明的國家，但是也會(huì)允許在必要情況下于入境之前從另一個(gè)申根國家(于5日之內(nèi))過境。多次入境簽證持有者可于簽證有效期期滿前的至少六個(gè)月內(nèi)開始新的簽證申請。實(shí)在不理解產(chǎn)品的，也可以直接在網(wǎng)上，或者電話和客服溝通。想推遲預(yù)約時(shí)間, 請?zhí)崆?天通知簽證申請中心, 可免費(fèi)給予推遲。其他護(hù)照在北京領(lǐng)區(qū)遞交。Ａ、申請人護(hù)照有效期須在簽證期過后還至少90天有效。B、中國公司近兩個(gè)月營業(yè)稅或增值稅繳款書原件及復(fù)印件。如由我社提供，費(fèi)用另計(jì)。B、戶口本原件及復(fù)印件，全體家庭成員的戶口本每一頁復(fù)印件（復(fù)印件內(nèi)容必須清晰）。覆蓋整個(gè)旅行的30萬的國際意外醫(yī)療保險(xiǎn)。派遣信應(yīng)包含：申請人姓名、性別、出生日期、護(hù)照號碼、年收入，邀請公司、訪問目的、出發(fā)日期、停留時(shí)間等，并注明擔(dān)保申請人按期回國同一單位的多位申請人需以名單形式打印在同一份派遣信上派遣信可以以中文打?。ú糠謬姨厥庖蟪猓?，且需提供原件至使館，使館不予退還個(gè)人簡歷具體要求：從高中寫起。然后根據(jù)學(xué)校的要求交納押金并且進(jìn)行住宿的預(yù)定。請注意: 無論簽證簽發(fā)與否, 簽證申請費(fèi)都無法退款。表格填寫完畢后，請將申請表全部打印出來，并在簽證面談當(dāng)天遞交（包括含條形碼的第 3 頁）。（提前在中信銀行交納） 收據(jù)（需要提前在網(wǎng)上用信用卡支付）“學(xué)生和交流訪問者信息系統(tǒng)”（SEVIS）付費(fèi)定為200 美元。但是不論怎么回答，都要注意一些陷阱，以下是一些問題：1)What is your plan? What will you do after graduation?What is your plan after you e back to china, as a teacher or find a high salary job?(注：這類似誘供，若回答high salary，對方會(huì)說美國工資更高，你不會(huì)回來！）2)Give me three reasons that you will e back to China?Why won’t you stay in the US?3)Can you explain why 90% Chinese students didn‘t e back?4)Do u feel that you are trapped in a logic loop? U c, you said you e back to earn money and you said youwill not be attracted by good living conditions?5)How much will you earn if you e back?6)You can also make more of this kind of money in US, why don‘t you want to earn more?1)Are you married?2)Any relative in the united states? Parents?...Anybody else in the US?注：(這個(gè)問題非常的敏感，如果真的有親屬在美國，也不能告訴簽證官，否則大多數(shù)會(huì)因?yàn)橐泼駜A向而拒簽)1)Where are you studying now?What are you doing for living? Which university are you in?2)What is your purpose for the visa?3)What is the most difficult class do you have?4)Where do/will you live ? Where is your Hukou(戶口，用中文)?5)Where is your hometown?6)Do you have any speciality?What’s your best/worst quality?7)Is it you?8)Why are you nervous?9)What is the thing you like best in America....Then what is the thing you don‘t like most in China?...What kind of good things do you know about America?What do you think is the best/worst thing of the ?Then what is the thing you like/don‘t like most in China?10)Do you think it is just luck which makes one receive his visa or not?11)When are you going to enter US?12)What is your dream?13)How old are you?14)Have you ever been to other countries?