[单项选择]The AGE’s activities involve
A. encouraging good recruitment practice.
B. organizing the training of new graduate recruiters.
C. analyzing recruitment statistics to predict trends.

[填空题]The volcanic activities involve no water in any form because the temperature is so high.

[填空题] How to Present a Seminar Paper
To involve their students more actively in the learning process, many
university teachers usually conduct seminars, in which one student is asked to
give his ideas on a certain topic and other students discuss the ideas.
There are two stages involved in presenting a paper at a seminar. One
is the (1)______stage which includes researching and writing up a topic. (1) ______
The other stage is the presentation stage when you actually present the paper
to the audience.
Two ways in which you can present your paper: a. (2) ______copies (2) ______
of your paper beforehand to all the participants so that they could read it
before the seminar and know about your ideas, b. Reading it aloud to the (3) ______
who are likely to make their own notes. Comparatively (3) ______
speaking, the first method is the more (4) ______way of conducting a (4) ______
seminar. How

[填空题]In Casey’s opinion, designers should also involve human-factor experts in their work in addition to ______.

[填空题]At the age of 40s and 50s, people should emphasize a variety of activities for ______.

[单项选择]设有关系表S(NO，NAME，AGE)，其中AGE为年龄字段，则表达式AGE NOT BETWEEN 18 AND 24等价于______
A. AGE＜=18 OR AGE＞=24
B. AGE＜=18 0R AGE＞24
C. AGE＜18 OR
D. AGE＜18 0R AGE＞24

[单项选择]Further evidence bearing on Jamison’s activities must have come to light. On the basis of previously available evidence alone, it would have been impossible to prove that Jamison was a party to the fraud, and Jamison’s active involvement in the fraud has now been definitively established.
The pattern of reasoning exhibited in the argument above most closely parallels that exhibited in which one of the following
A. Smith must not have purchased his house within the last year. He is listed as the owner of that house on the old list of property owners, and anyone on the old list could not have purchased his or her property within the last year.
B. Turner must not have taken her usual train to Nantes today. Had she done so, she could not have been in Nantes until this afternoon, but she was seen having coffee in Nantes at 11 o’clock this morning.
C. Norris must have lied when she said that she had not authorized the investigation. There is no doubt that she did authorize it, and authorizing an investigation is not something anyone is likely to have forgotten.
D. Waugh must have known that last night’s class was canceled. Waugh was in the library yesterday, and it would have been impossible for anyone in the library not to have seen the cancellation notices.
E. (E) LaFort must have deeply resented being passed over for promotion. He maintains otherwise, but only someone who felt badly treated would have made the kind of remark. LaFort made at yesterday’s meeting.

[填空题]在“学生选课一课程”数据库中的3个关系如下： S(S#, SNAME，SEX，AGE)， SC(S#，C#，GRADE)， C(C#，CNAME，TEACHER)。 查找选修“数据库技术”这门课程的学生的学生名和成绩。若使用连结查询的SQL语句是： SELECT SNAME，GRADE FROMS，SC，C WHERE CNAME=‘数据库技术’ AND S.S#=SC.S# AND ______

[单项选择]

SQL的DDL主要是定义（）。若有： 
学生关系模式S（Sno，Sname，Age，Sex）， 
课程关系模式C（Cno，Cname，Teacher）以及 
成绩关系模式SC（Sno，Cno，Grade），其中S的属性分别表示学生的学号、姓名、年龄、性别，C的属性分别表示课程号、课程名、任课教师姓名，SC的属性分别表示学号、课程号、成绩。 
若要在表S中增加一个“家庭住址”（Address）属性，应使用语句（）Address VARCHAR（30）；若要在表S中删除Age属性，应使用语句：（）；已知某课程的课程号为‘C1’，若要输出该课程的平均成绩，应使用语句：SELECT（）WHERE Cno=‘C1’；若要删除表S、C和SC，应使用（）语句。

若要删除表S、C和SC，应使用（）语句。
A. DELETE
B. DROP
C. RELEASE
D. FREE