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费密年龄理论 Fermi age theory
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(34）查询所有目前年龄是22岁的学生信息：学号，姓名和年龄，正确的命令组是A）CREATE VIEW AGE LIST AS; SELECT学号，姓名,YEAR(DATEQ)-YEAR(出生日期）年龄FROM学生； SELECT学号，姓名，年龄FROM AGE LIST WHERE年龄=22B）CREATE VIEW AGE LIST AS； SELECT学号，姓名，YEAR（出生日期）FROM学生；SELECT学号，姓名，年龄FROM AGE -L IST WHERE YEAR（出生日期）=22C）CREATE VIEW AGE LIST AS； SELECT学号，姓名,YEAR(DATEQ)-YEAR(出生日期）年龄FROM学生； SELECT学号，姓名，年龄FROM学生WHERE YEAR(出生日期)=22D）CREATE VIEW AGE LIST AS STUDENT； SELECT学号，姓名，YEAR(DATE（））-YEAR(出生日期）年龄FROM学生；SELECT学号，姓名，年龄FROM STUDENT WHERE年龄=22
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对于学生信息表S(SNUMBER，SNAME，SEX，AGE，DEPT)(STUDENT由学号SN0，姓名SNAME，性别SEX，年龄AGE，所在系DEPT5个属性组成，其中SNUMBER为主码)，求年龄20～23岁之间的学生姓名和年龄，正确的语句是（ ）。A) SELECT SNAME, AGE FROM S WHERE AGE20 OR AGE23B) SELECT SNAME, AGE FROM S WHERE AGE BETWEEN 20 AND 23C) SELECT * FROM S WHERE AGE BETWEEN 20 AND 23D) 以上均不正确
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检索所有比"王华"年龄大的学生姓名、年龄和性别。正确的SELECT语句是()
A、SELECT SN，AGE，SEX FROM SSHERE AGE>(SELECT AGE FROM S)WHERE SN=’王华’)B、SELECT SN，AGE，SEXFROM SWHERE SN=’王华’C、SELECT SN，ACE，SEX FROM SWHERE AGE>(SELECT ACEWHERE SN=’王华’)D、SELECT SN，ACE，SEX FROM SWHERE ACE>王华AGE
考题
根据SQL标准，要查询表student中平均年龄age小于21的所在系dept及其平均年龄值，下面哪条语句适用?()A select dept,avg(age) from student where avg(age)B select dept,avg(age) from student group by dept having avg(age)C select dept,avg(age) from student having avg(age)D select dept,avg(age) from student group by dept where avg(age)
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根据SQL标准，下面哪句语句能够找出年龄最小的同学?其中age为学生表student中的年龄字段，sno为学生的学号。()A select max(age) from studentB select sno from student where age = max(age)C select sno from student having age = max(age)D select sno from student a where a.age
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S(S#,SN,SEX,AGE,DEPT) C(C#,CN) SC(S#,C#,GRADE)其中：S#为学号，SN为姓名，SEX为性别，AGE为年龄，DEPT为系别，C#为课程号， CN为课程名，GRADE为成绩。检索所有比“王华”年龄大的学生姓名、年龄和性别。正确的SELECT语句是______。A．SELECT SN,AGE,SEX FROM S WHERE AGE＞(SELECT AGE FROM S WHERE SN＝'王华')B．SELECT SN, AGE, SEX FROM S WHERE SN='王华'C．SELECT SN,AGE,SEX FROM S WHERE AGE＞(SELECT AGE WHERE SN＝'王华')D．SELECT SN,AGE,SEX FROM S WHERE AGE＞王华AGE
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S(S,SN,SEX,AGE,DEPT)C(C,CN)SC(S,C,GRADE)其中:S为学号,SN为姓名,SEX为性别,AGE为年龄,DEP
S(S#,SN,SEX,AGE,DEPT) C(C#,CＮ) SC(S#,C#,GRADＥ) 其中：S#为学号，SN为姓名，SEX为性别，AGE为年龄，DEPT为系别，C#为课程号， CN为课程名，GRADE为成绩。检索所有比“王华”年龄大的学生姓名、年龄和性别。 正确的SELECT语句是______。A．SELECT SN,AGE,SEX FROM S WHERE AGE＞(SELECT AGE FROM S WHERE SN＝‘王华’)B．SELECT SN,AGE,SEX FROM S WHERE SN＝‘王华’C．SELECT SN,AGE,SEX FROM S WHERE AGE＞(SELECT AGE WHERE SN＝‘王华’)D．SELECT SN,AGE,SEX FROM S WHERE AGE＞王华 AGE
考题
对于学生信息表STUDENT（SNO， SNAME，SEX，AGE，DEPT)（STUDENT由学号SNO、姓名SNAME、性别SEX、年龄AGE、所在系DEPT 5个属性组成，其中SNO为主码），求年龄20～23岁之间的学生姓名和年龄，正确的语句是（ ）。A．SELECT SNAME，AGE FROM STUDENT WHERE AGE20 AND AGE23B． SELECT*FROM STUDENT WHERE AGE BETWEEN 20 AND 23C．SELECT SNAME，AGE FROM STUDENT WHERE AGE BETWEEN 20 AND 23D．以上均不正确
考题
设员工关系Emp（E_no，E_name，E_sex，D_name，E_age，E_Add），关系Emp中的属性分别表示员工的员工号、姓名、性别、所在部门、年龄和通信地址；其中D_name是部门关系Dept的主键。查询各个部门员工的最大年龄、最小年龄，以及最大年龄与最小年龄之间年龄差的SQL语句如下：SELECT D_name, MAX（E_age）,MIN（E_age）, （61） FROM Emp （62），（61）A. MAX（E_age）-MIN（E_age）IN 年龄差B. 年龄差IN MAX（E_age）-MIN（E_age）C. MAX（E_age）-MIN（E_age）AS 年龄差D. 年龄差AS MAX（E_age）-MIN（E_age）（62）A. GROUPBYE_nameB. GROUP BYD_nameC. ORDER BY E_nameD. ORDER BYD_name
考题
检索所有比“王华”年龄大的学生姓名、年龄和性别。正确的SELECT语句是______。A．SELECT SN,AGE,SEX FROM S WHERE AGE＞(SELECT AGE FROM S WHERE SN='王华')B．SELECT SN,AGE,SEX FROM S WHERE SN='王华'C．SELECT SN,AGE, SEX FROM S WHERE AGE＞(SELECT AGE WHERE SN='王华')D．SELECT SN,AGE,SEX FROM S WHERE AGE＞王华 AGE
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Fermi ProblemOn a Monday morning in July,the world's first atom bomb exploded in New Mexico desert. Forty seconds later,the shock waves reached the base camp where the Italian-American physicist Enrico Fermi and his team stood.After a mental calculation,Fermi announced to his team that the bomb's energy had equated 10,000 tons of TNT. The bomb team was impressed,but not sur-prised.Fermi's genius was known throughout the scientific world.In 1938 he had won a Nobel Prize.Four years later he produced the first nuclear chain reaction,leading us into the nuclear age .Since Fermi's death in 1954,no physicist has been at once a master experimentalist（实验室）and a leading theoretician（理论学家）.Like all virtuosos（大师）,Fermi had a distinctive style. He preferred the most direct route to an answer. He was very good at dividing difficult problems into small,manageable bits talent we all can use in our daily lives.To develop this talent in his students,Fermi would suggest a type of question now known as a Fermi problem.Upon first hearing one of these,you haven't the remotest notion of the answer, and you feel certain that too little information had been given to solve it. Yet when the problem is broken into sub-problems,each answerable without the help of experts or books,you can come close to the exact solution.Suppose you want to determine earth's circumference without looking it up.Everyone knows that New York and Los Angeles are about 3,000 miles apart and that the time difference between them is three hours.Three hours is one-eighth of a day,and a day is the time it takes the planet to complete one rotation（旋转）,so its circumference must be eight times 3 ,000 or 24,000 mi-les .This answer differs from the true value,24,902 .45 miles,by less than four percent.Ultimately the value of dealing with everyday problems the way Fermi did lies in the rewards of making independent discoveries and inventions.It doesn't matter whether the discovery is as important as determining the power of an atom or as small as measuring the distance between New York and Los Angeles.Looking up the answer,or letting someone else find it,deprives you of the pleasure and pride that accompany creativity,and deprives you of an experience that builds up self-confidence.Thus,approaching personal dilemmas as Fermi problems can become a habit that enriches your life. Fermi's team was impressed by Fermi's announcement in the base camp because he could even work out the power of the atom bomb in his mind.A:.RightB: WrongC:Not mentioned
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共用题干
Fermi ProblemOn a Monday morning in July,the world's first atom bomb exploded in New Mexico desert. Forty seconds later,the shock waves reached the base camp where the Italian-American physicist Enrico Fermi and his team stood.After a mental calculation,Fermi announced to his team that the bomb's energy had equated 10,000 tons of TNT. The bomb team was impressed,but not sur-prised.Fermi's genius was known throughout the scientific world.In 1938 he had won a Nobel Prize.Four years later he produced the first nuclear chain reaction,leading us into the nuclear age .Since Fermi's death in 1954,no physicist has been at once a master experimentalist（实验室）and a leading theoretician（理论学家）.Like all virtuosos（大师）,Fermi had a distinctive style. He preferred the most direct route to an answer. He was very good at dividing difficult problems into small,manageable bits talent we all can use in our daily lives.To develop this talent in his students,Fermi would suggest a type of question now known as a Fermi problem.Upon first hearing one of these,you haven't the remotest notion of the answer, and you feel certain that too little information had been given to solve it. Yet when the problem is broken into sub-problems,each answerable without the help of experts or books,you can come close to the exact solution.Suppose you want to determine earth's circumference without looking it up.Everyone knows that New York and Los Angeles are about 3,000 miles apart and that the time difference between them is three hours.Three hours is one-eighth of a day,and a day is the time it takes the planet to complete one rotation（旋转）,so its circumference must be eight times 3 ,000 or 24,000 mi-les .This answer differs from the true value,24,902 .45 miles,by less than four percent.Ultimately the value of dealing with everyday problems the way Fermi did lies in the rewards of making independent discoveries and inventions.It doesn't matter whether the discovery is as important as determining the power of an atom or as small as measuring the distance between New York and Los Angeles.Looking up the answer,or letting someone else find it,deprives you of the pleasure and pride that accompany creativity,and deprives you of an experience that builds up self-confidence.Thus,approaching personal dilemmas as Fermi problems can become a habit that enriches your life. Dividing a big problem into small problems is a talent Fermi had and a talent that has practi- cal value in life.A: RightB: WrongC: Not mentioned
考题
共用题干
Fermi ProblemOn a Monday morning in July,the world's first atom bomb exploded in New Mexico desert. Forty seconds later,the shock waves reached the base camp where the Italian-American physicist Enrico Fermi and his team stood.After a mental calculation,Fermi announced to his team that the bomb's energy had equated 10,000 tons of TNT. The bomb team was impressed,but not sur-prised.Fermi's genius was known throughout the scientific world.In 1938 he had won a Nobel Prize.Four years later he produced the first nuclear chain reaction,leading us into the nuclear age .Since Fermi's death in 1954,no physicist has been at once a master experimentalist（实验室）and a leading theoretician（理论学家）.Like all virtuosos（大师）,Fermi had a distinctive style. He preferred the most direct route to an answer. He was very good at dividing difficult problems into small,manageable bits talent we all can use in our daily lives.To develop this talent in his students,Fermi would suggest a type of question now known as a Fermi problem.Upon first hearing one of these,you haven't the remotest notion of the answer, and you feel certain that too little information had been given to solve it. Yet when the problem is broken into sub-problems,each answerable without the help of experts or books,you can come close to the exact solution.Suppose you want to determine earth's circumference without looking it up.Everyone knows that New York and Los Angeles are about 3,000 miles apart and that the time difference between them is three hours.Three hours is one-eighth of a day,and a day is the time it takes the planet to complete one rotation（旋转）,so its circumference must be eight times 3 ,000 or 24,000 mi-les .This answer differs from the true value,24,902 .45 miles,by less than four percent.Ultimately the value of dealing with everyday problems the way Fermi did lies in the rewards of making independent discoveries and inventions.It doesn't matter whether the discovery is as important as determining the power of an atom or as small as measuring the distance between New York and Los Angeles.Looking up the answer,or letting someone else find it,deprives you of the pleasure and pride that accompany creativity,and deprives you of an experience that builds up self-confidence.Thus,approaching personal dilemmas as Fermi problems can become a habit that enriches your life.The last paragraph concludes the whole writing by stressing the value of important inventions and small discoveries.A: RightB: WrongC: Not mentioned
考题
对于学生信息表（XSB），包含字段：学号（SNO），姓名（SNAME），性别（SEX），年龄（AGE），所在系（DEPT），其中SNO为主码，检索年龄在20~30之间的学生姓名和年龄，正确的语句是（）A、select sname，age from xsb where age20and age23B、select*from xsb where age between20 and 23C、select sname，age from xsb where agebetween20 and 23
考题
在VisualFoxPro中，使用SQL命令将学生STUDENT中的学生年龄AGE字段的值增加1岁，应该使用的命令是（）。A、REPLACE AGE WITH AGE+1B、UPDATE STUDENT AGE WITH AGE+1C、UPDATE SET AGE WITH AGE+1D、UPDATE STUDENT SET AGE=AGE+1
考题
使用SQL命令将学生表STUDENT中的学生年龄AGE字段的值增加1岁，应该使用的命令是（）。A、REPLACE AGE WITH AGE+1B、UPDATE STUDENT AGE WITH AGE+1C、UPDATE SET AGE WITH AGE+1D、UPDATE STUDENT SET AGE=AGE+1
考题
单选题窗体中有一个年龄文本框txtAge，下面（）代码可以获得文本框中的年龄值。A
int age=txtAge；B
int age=txtAgE.Text；C
int age=Convert.ToInt32（txtAgE.；D
int age=int.Parse（txtAgE.Text）；
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