Our S/C No. 2525 emphasizes that insurance is to be covered _____110% of the invoice value.
The calendar on the supposed date divides all time into B.C. (Before Christ ) and A.D. ( a Latin phrase, in the year of our Lord.)
4. If you give us a _____ on our first order, say ten percent, we can accept the end of May as a delivery date.
19.We understand you need easy access_____up-to-date information about your accounts in our bank.
假设学生关系S（S＃，SNAME，SEX），课程关系C（C＃，CNAME），学生选课关系SC（S＃，C＃，GRADE）。要查询选修“Computer”课的男生姓名，将涉及到关系（）。
Your request of advancing the shipment date by one month is absolutely beyond our capability although we strongly wish we could have complied with your request.尽管我们很满足贵方想把装运期提前一个月的愿望，但这一要求大大超出了我们的能力范围。
设有关系R(A，B，C)和S(C，D)。与SQL语句select A，B，D from R，S where R .C=S.C等价的关系代数表达式是（ ）
有关系 S(S#,SNAME,SAGE), C(C#,CNAME), SC(S#,C#,GRADE)。要查询选修”ACCESS”课的年龄不小20的全体学生姓名的SQL语句”SELECT SNAME FROM S,C,SC WHERE 子句”。这里的WHERE子句的内容是（ ）。
假定学生关系是S（S，SNAME，SEX，AGE)，课程关系是C（C，CNAME，TACHER)，学生选课关系是SC（S，C，GRAD
A．πA,D（σC=D（R×S))B．πA,R,D（σS,C=R,D/（R×S))C．πA,R,D（σR,C=S,D（R×S))D．πR,A,D（σS,C=S,D（R×S)
若“学生-选课—课程”数据库中的三个关系是：S（S，SNAME，SEX，AGE)，SC（S，C，GRADE)，C（C，CNAME，TEAC
Our client has agreed to _____shipment date of their L／C to August 30
设有下列3个关系S，C，SC，它们的主码分别是S，C，(S，C) S(S,SName) C(C,CName) SC(S,C,Grade) 下列关于保持数据库完整性的叙述中，不正确的是()。
We have pleasure in offering you the goods _____ in our cable of today’s date.
Id like to fix______date for our next meeting，but selecting______suitable day is not easy．
假定学生关系S（s，SNAME，SEX，AGE)，课程关系是C（C，CNAME，TEACHER)，学生选课关系是SC（S，C，GRADE
假定学生关系是S（S，SNAME，SEX，AGE)，课程关系是C（C，CNAME， TEACH-ER)，学生选课关系是SC（S，C，G
1、项目四 缮制商业发票 根据下列合同、信用证及其他补充条款缮制发票。 JIANGXI TEXTILES IMP. & EXP. CORP. 8th FLOOR FOREIGN TRADE BUILDING 200 ZHANQIAN ROAD, NANCHANG, CHINA SALES CONFIRMATION THE BUYERS: NICHIMEN CORPORATION S/C NO.：JXTEX012 2-2 NAKANOSHMA 3-CHOME，KITA-KU DATE：JAN.10，2016 OSAKA, 632-8620, JAPAN THE UNDERSIGNED SELLERS AND BUYERS HAVE AGREED TO CLOSE THE FOLLOWING TRANSACTIONS ACCORDING TO THE TERMS AND CONDITIONS STIPULATED BELOW: 1. COMMODITY AND SPECIFICATI
Our teacher is really __ ; she never tells jokes. 2 My first blind date was __ girl I had ever met. 3 The restaurant has very good service; all the waiters and waitresses are __. 4 The actress looks s
有关系S（s，SNAME，SEX)，c（C}}，CNAME)，SC（S，C)。其中S为学生号，SNAME为学生姓名，SEX为性别，c为
基于“学生-选课-课程”数据库中的3个关系： S（S，SNAME，SEX，DEPARTMENT)，主码是S C（C，CNAME，TEACHER)，主码是C SC（S，C，GRADE)，主码是（S，C) 查找每个学生选修的课程名和成绩，将使用关系（）
We write to draw your attention to the fact that our statement of account dated Octobe
对于教学数据库的三个基本表学生 S（S,SNAME,AGE,SEX)学习 SC（S,C,GRADE)课程 C（C,CNAME,TE
Your order NO. 245 was confirmed by our fax of 20 Sep., subject to_____of your L/C wihin 15 days from the date（）
