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A.innovate
B.involve
C.classify
D.translate
答案
更多“The modern age of science and technology has witnessed an increased combination of the”相关的问题
第1题
A,SC
B、s
C、S,SC,C
D、SC,C
第2题
以下2题基于以下说明。设有三个关系
学生关系S(SNO,SNAME,AGE,SEX)(分别代表学生的学号、姓名、年龄、性别)
学习关系SC(SNO,CNO,GRADE)(分别代表学生的学号、课程编号、成绩)
课程关系C(CNO,CNAME,TEACHER)(分别代表课程的编号、课程名、任课教师)
“从学习关系SC中检索无成绩的学生学号”的SQL语句是
A．SELECT sno FROM sc WHERE grade＝NULL
B．SELECT sno FROM sc WHERE grade IS
C．SELECT sno FROM sc WHERE grade IS NULL
D．SELECT sno FROM sc WHERE grade＝0
第3题
A.SELECT * FROM C
B.SELECT * FROM S
C.SELECT Sname，2021-age FROM S
D.SELECT Sname，age FROM S
第4题
第5题
A.ПCNAME, GRADE (σCNAME=’数据库技术’(C) ∞ПSNO, CNO, GRADE (SC) ∞ПSNO, SNAME (S) )
B.ПCNAME, GRADE (σCNAME=’数据库技术’(C) ∞ SC ∞ S)
C.ПCNAME, GRADE (C ∞ SC ∞ SC)
D.ПCNAME, GRADE (σCNAME=’数据库技术’ (ПCNAME (C)) ∞ПSNO, CNO, GRADE (SC) ∞ПSNO, SNAME (S) )
第6题
设有如下所示的关系S(S#,SNAME,AGE,SEX)、C(C#,CNAME,TEACHER)和SC(S#,C#,GRADE)，试用关系代数表达式表示下列查询语句：。
(1)检索选修全部课程的学生姓名(SNAME)。
(2)检索选修课程包含学号为2的学生所修课程的学生学号(S#)。
(3)检索选修课程名为“C语言”的学生学号(S#)和姓名(SNAME)。
第7题
A.SELECTS#FROMSCWHEREC#=“C2”ANDGRADE＞=(SELECTGRADEFROMSCWHEREC#=“C2”)
B.SELECTS#FROMSCWHEREC#=“C2”ANDGRADEIN(SELECTGRADEFROMSCWHEREC#=“C2”)
C.SELECTS#FROMSCWHEREC#=“C2”ANDGRADENOTIN(SELECTGRADEFROMSCWHEREC#=“C2”)
D.SELECTS#FROMSCWHEREC#=“C2”ANDGRADE＞=ALL(SELECTGRADEFROMSCWHEREC#=“C2”)
第8题
Yet one saw, even before the 100th anniversary of the death of Queen Victoria this year, that there were signs these sneering attitudes were beginning to change. Programmes on radio and television about Victoria and the age that was named after her managed to humble themselves only about half the time. People were beginning to realize that there was something heroic about that epoch and, perhaps, to fear that the Victorian age was the last age of greatness for this country.
Now a new book, What The Victorians Did For Us, aims further to redress the balance and remind us that, in most essentials, our own age is really an extension of what the Victorians created. You can start with the list of Victorian inventions. They were great lovers of gadgets from the smallest domestic ones to new ways of propelling ships throughout the far-flung Empire. In medicine, anaesthesia (developed both here and in America) allowed surgeons much greater time in which to operate—and hence to work on the inner organs of the body—not to mention reducing the level of pain and fear of patients.
To the Victorians we also owe lawn tennis, a nationwide football association under the modern rules, powered funfair rides, and theatres offering mass entertainment. And, of course, the modern seaside is almost entirely a Victorian invention. There is, of course, a darker side to the Victorian period. Everyone knows about it mostly because the Victorians catalogued it themselves. Henry Mayhew’s wonderful set of volumes on the lives of the London poor, and official reports on prostitution, on the workhouses and on child labour—reports and their statistics that were used by Marx when he wrote Das Kapital—testify to the social conscience that was at the center of “Victorian values”.
But now, surely, we can appreciate the Victorian achievement for what it was—the creation of the modern world. And when we compare the age of Tennyson and Darwin, of John Henry Newman and Carlyle, with our own, the only sensible reaction is one of humility: “We are our father’s shadows cast at noon”.
第16题：According to the author, Lytton Strachey’s book Eminent Victorians _____.
[A] accurately described the qualities of the people of the age
[B] superficially praised the heroic deeds of the Victorians
[C] was highly critical of the contemporary people and institutions
[D] was guilty of spreading prejudices against the Victorians
第9题
Some people hate everything that is modern. They cannot imagine how anyone can really like modern music; they
find it hard to accept the new fashions in clothing; they think that all modern painting is ugly; and they seldom
have a good word for the new buildings that are being built everywhere in the world. Such people look for
perfection in everything, and they take their standards of perfection from the past. They are usually impatient
with anyone who is brave enough to experiment with new or to express himself or the age in materials original
ways. It is, of course, true that many artists do not succeed in their work and instead produce works that can
only be considered as failures. If the work of art is a painting, the artist’s failure concerns himself alone, but if
it is a building, his failure concerns others too, because it may damage the beauty of the whole place. This does
sometimes happen, but it is completely untrue to say, as some people do, that modern architecture is nothing.
We can’t judge every modern building by the standards of the ancient time, even though we admire the ancient
buildings. Technologically, the modern buildings are more advanced. The modern architect knows he should learn
from the ancient works, but with his greater resources of knowledge and materials, he will never be content to
imitate the past. He is too proud to do that.
Some people hate everything that is modern because _______.
A. they are aged
B. they find it hard to accept modern things
C. they take their standards of perfection from the Greek
D. they look at things by the standards of the past
第10题
设教学数据库中有三个关系： 学生关系 S（S#,SNAME,AGE,SEX） 选课关系 SC(S#,C#,GRADE) 课程关系 C(C#,CNAME,TEACHER) 用SQL语句实现下面查询： 1.查询不学C2课的学生姓名与年龄。 2.求刘老师所授课程的每门课程的平均成绩。 3.求年龄大于女同学平均年龄的男学生姓名和年龄。 4.检索学习全部课程的学生姓名； 即在表S中找学生，要求这个学生学了全部课程。换言之，在S表中找学生，在C中不存在一门课程，这个学生没有学。 5.往关系C中插入一个课程元组（‘C8’，‘VC++’，‘BAO’）
