阅读以下说明和数据流图，回答问题1～3问题。
[说明]
学生信息管理系统旨在用微型计算机对全校的学生事务进行管理，其内容包括新生管理、成绩管理、重修管理、毕业资格审定以及随机查询和打印报表等。
教务人员在进入系统时，系统通过注册登录来提供用户的访问权限，系统会检查用户的合法性，如不合法，系统拒绝用户进入，如是合法用户，则根据命令要求类型处理。本系统主要有新生管理、成绩管理、重修处理、资格审定四大功能，分别进行不同的管理。
新生管理首先按照各专业录入新生信息，录入时若录入的信息不完整，则给出提示信息，要求用户录入完整信息；若新生库中已经存在该生信息了，则给出提示信息，保证不重复录入新生信息。在录入阶段，会显示新生库中的记录，可以进行浏览、删除、修改等操作，以便用户录入正确无误的新生信息。录入完毕后，打印编好学号和分好班次的新生名单并将新生记录写入学生信息库。
成绩管理使用一般方法和特殊方法对学生成绩进行管理。分别按照这两种方法进行成绩的录入和计算。成绩处理完毕后，合并到学生成绩库，可以对学生成绩总库进行浏览、修改、删除、插入、查找等操作，同时提供成绩查询功能，可按照学号、姓名、课程号、课程名称、专业班级查询学生成绩，最后打印各种形式的学生成绩单。
重修处理首先对学生重修总体情况进行浏览，可以查询未交费学生重修情况、某个学生重修情况等，打印各种形式的重修单和重修证。另外进行重修交费登记，输入某个重修学生学号，则显示该生相关信息 (姓名、专业等)、重修课程信息、重修总学分、应交金额等，交费登记后，写入重修表和交费表。资格审定主要对毕业生的毕业资格进行审定，计算毕业生的已修学分，审定后填写资格库，显示审定结果，打印毕业生资格表和毕业证书等。
学生信息管理系统顶层图如图10-1所示；学生信息管理系统的第0层DFD图如图10-2所示，其中，加工3的细化图如图10-3所示，加工4的细化图如图10-4所示。
[数据流图 10-1]
(1)数据流图10-2缺少了一条数据流，请给出此数据流的指向，并采用说明中的词汇给出此数据流名。
(2)数据流图10-3缺少一条数据流，请根据说明补充完整。并指出此数据流的起点和终点。

A. They call at inopportune times. They say stupid things. They butt in, they boss you around, they embarrass you in public. They invite themselves over. They take advantage. You've done the best you can, but they need professional help. On top of all this, they love you to death and are convinced they're your best friends on the planet.
B. They call you up, they listen to your complaints, they celebrate your successes and curse your misfortunes, and you do the same for them in return. They hold out through innumerable crises before concluding that the person you're dating is no good, and even then understand if you ignore their good counsel. They accompany you to a movie with subtitles or to see the diving pig at Aquarena Springs. They feed your cat when you are out of town and pick you up from the air port when you get back.
C. While so many family relationships are tinged with guilt and obligation, a relationship with a Relative Friend is relatively worry-free. You don't even have to hide your vices from this delightful person. When you slip out Aunt Joan's back door for a cigarette, she is already there.
D. Your friendship is cemented by jokes about coworkers and thoughtful favors around the office. Did you see Ryan's hair？ "Want half of my bread." Soon you know the names of his turtles, what he did last Friday night, exactly which model CD player he wants for his birthday. His hand writing is as familiar to you as your own.
E. But what was it that drove you apart？ A misunderstanding, a betrayed confidence, an un-repaid loan, an ill-conceived flirtation. A poor choice of spouse can do in a friendship just like that. Going into business together can be a serious mistake. Time, money, distance, religions: all noted friendship killers. You quit doing drugs, you're not such good friends with your dealer anymore.
F. Without them, you would never get any mail addressed in handwriting. A Faraway Friend calls late at night, invites you to her wedding, always says she is coming to visit but rarely shows up. An actual visit from a Faraway Friend is a cause for celebration and parties of all kinds. Cigarettes, Ch