题目内容
查询全部学生的选课成绩信息？学生表是主表，还是成绩表是主表?
查看答案
搜索结果不匹配？点我反馈
更多问题
全外连接查询的特点是左、 右两端表中的记录都输出，全外连接查询中所有表中的记录信息都保留在结果集中。 如果没能找到匹配的元组， 就使用（ ）来代替。
RandomAccessFile所实现的接口是__接口和DataOutput 接口
____所实现的接口是DataInput 接口和DataOutput 接口
2. Fill in each blank with a suitable preposition or adverb. （注意：如果一道题有两个空要用逗号隔开如in，on；注意大小写）1) British law requires that all children attend school _____ the ages of 5 and 16.2) Many other countries model their schools _____ British schools, and _____ good reason.3) _____ assembly or field trip days, a white shirt and dark tie replace the casual tee shirt.4) Regardless _____ a student’s score, he or she will move on to the next level of schooling.5) _____ completion of the exams, some students leave school and go straight to work6) Those preparing _____ university take advanced courses _____ one to five subjects.7) Like William, some British teenagers take a year _____ before college to have a break.8) Most university students live _____ campus in small single rooms.
微信支付 
支付宝支付