单选题The percent change in the weight from age 2 months to age 10 months is approximately ______ the percent change in the weight from age 10 months to age 19 months.A equal toB 2 timesC 3 times

题目
单选题
The percent change in the weight from age 2 months to age 10 months is approximately ______ the percent change in the weight from age 10 months to age 19 months.
A

equal to

B

2 times

C

3 times

相似考题

1.检索所有比“王华”年龄大的学生的姓名、年龄和性别，正确的SELECT语句是______。A．SELECT SN,AGE,SEX FROM S SHERE AGE＞(SELECT AGE FROM S WHERE SN='王华')B．SELECT SN,AGE,SEX FROM S WHERE SN='王华'C．SELECT SN,ACE,SEX FROM S WHERE AGE＞(SELECT ACE WHERE SN='王华')D．SELECT SN,ACE,SEX FROM S WHERE ACE＞王华 AGE

2.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 AGE>20 OR AGE<23B) 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

3.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

4.对于学生信息表：student(sno，sname，sex，age，dept)，能够得到年龄在20岁到22岁之间的学生的姓名和学号的语句是A．SELECT * FROM student WHERE age BETWEEN 20 AND 22B．SELECT sname，sno FROM student WHERE age BETWEEN 20 AND 22C．SELECT sname，sno FROM student WHERE age＞=20D．SELECT sname，sno FROM student WHERE age＜=22

更多“单选题The percent change in the weight from age 2 months to age 10 months is approximately ______ the percent change in the weight from age 10 months to age 19 months.A equal toB 2 timesC 3 times”相关问题

  • 第1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)<21

    B select dept,avg(age) from student group by dept having avg(age)<21

    C select dept,avg(age) from student having avg(age)<21

    D select dept,avg(age) from student group by dept where avg(age)<21


    参考答案B

  • 第2题：

    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 student

    B 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<= (select min(b.age) from student b)


    参考答案D

  • 第3题：

    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


    正确答案：A
    解析：选项B查询的结果是显示出姓名为王华的学生姓名、年龄、和性别。
    选项C在嵌套的SELECT语句中缺少必要的短语FROM。
    选项D格式不正确。

  • 第4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 AGE>20 AND AGE<23B． 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


    正确答案：C
    A项在表述年龄的范围时有错误，SQL并不是那样表示的，B项不符题意，查询的结果为学生信息表的所有字段。

  • 第5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


    正确答案：A

  • 第6题：

    Our ______ sensitivity decreases with age. By age 60, most people have lost 40 percent of their ability to smell and 50 percent of their taste buds.

    A.sensible
    B.senseless
    C.sensitive
    D.sensory

    答案：D
    解析：
    本题考查形容词词义辨析

    D选项，句意：我们的感官能力随着年龄的增长而下降。比如说，到60岁的时候，多数人失去了他们40%的嗅觉能力和50%的味觉能力。sensory意为“感觉的，传递感觉的”，综上，D选项正确。

    A选项，sensible意为“明智的，合情理的”，故排除。

    B选项，senseless意为“失去知觉的，不省人事的”，故排除。

    C选项，sensitive意为“敏感的”，故排除。

    故正确答案为D 项。

  • 第7题：

    He was banned from driving for six months.

    A:listed
    B:forbidden
    C:handled
    D:investigated

    答案：B
    解析：
    本句意思：他被禁止驾驶六个月。ban禁止。list列清单，拟定清单；forbid禁止；handle对付，应对；investigate调查。

  • 第8题：

    下列SQL语句中，能够完成求某列最大值的是（）。

    • A、SELECT AVG（Age） FROM Student
    • B、SELECT MAX（Age） FROM Student
    • C、SELECT MIN（Age） FROM Student
    • D、SELECT COUNT（*） FROM Student

    正确答案:B

  • 第9题：

    单选题
    下列SQL语句中，能够完成求某列最大值的是（）。
    A

    SELECT AVG（Age） FROM Student

    B

    SELECT MAX（Age） FROM Student

    C

    SELECT MIN（Age） FROM Student

    D

    SELECT COUNT（*） FROM Student


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    The percent change in the weight from age 2 months to age 10 months is approximately ______ the percent change in the weight from age 10 months to age 19 months.
    A

    equal to

    B

    2 times

    C

    3 times


    正确答案： C
    解析：
    根据图表可知，大象在2个月大到10个月大时体重几乎增加了一倍，而从10个月大到19个月大时体重增加了1/2，因此前一个比例变化是后者的2倍。

  • 第11题：

    单选题
    Our _____ sensitivity decreases with age. By age 60, most people have lost 40 percent of their ability to smell and 50 percent of their taste buds.
    A

    sensible

    B

    senseless

    C

    sensitive

    D

    sensory


    正确答案： A
    解析：
    sensible意为“明智的，合情理的”；senseless意为“失去知觉的，不省人事的”：sensitive意为“敏感的”；sensory意为“感觉的，传递感觉的”。句意为“我们的感官能力随着年龄的增长而下降。比如说，到60岁的时候，多数人失去了他们40%的嗅觉能力和50%的味觉能力”。

  • 第12题：

    单选题
    For integer values of the age from 10 months to 14 months, the average (arithmetic mean) weight falls approximately between ______ pounds.
    A

    750 and 850

    B

    850 and 950

    C

    950 and 1050


    正确答案： C
    解析：
    在10个月时，大象的体重大约为800磅，到了14个月大象的体重大约为1000磅，在这期间大象的体重变化比较平稳，因此体重平均数大约为900磅，故答案选B。

  • 第13题：

    根据SQL标准，要修改表student中所有学生的年龄age，使之在原值基础上减一，下面哪个语句适用?()

    A update student set age = 1

    B update student set age = age - 1

    C update age = age -1 from student

    D update from student where age = age -1


    参考答案B

  • 第14题：

    根据SQL标准，下面哪条语句与select min(age) from student等效?()

    A select age from student where age >= min(age)

    B select distinct age from student where age >= all min(age)

    C select distinct a.age from student a where a.age<= any (select distinctb.age from student b)

    D select distinct a.age from student a where a.age<= all (select distinct b.age from student b)


    参考答案D

  • 第15题：

    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


    正确答案：A
    解析：选项B查询的结果是显示出姓名为王华的学生姓名、年龄、和性别。选项C在嵌套的SELECT语句中缺少必要的短语FROM。选项D格式不正确。

  • 第16题：

    Given the following query:SELECT last_name, first_name, age, hire_date FROM employee WHERE age >40Which of the following clauses must be added to return the rows sorted by AGE, oldest first, and by LAST_NAME, from A to Z?（）

    A.SORT BY age ASC, last_name

    B.SORT BY age DESC, last_name

    C.ORDER BY age DESC, last_name

    D.ORDER BY age ASC, last_name


    参考答案：C

  • 第17题：

    Our__________ sensitivity decreases with age． By age 60, most people have lost 40 percent of their ability to smell and 50 percent of their taste buds．

    A.sensible
    B.senseless
    C.sensitive
    D.sensory

    答案：D
    解析：
    考查形容词辨析。句意为“我们的__________随着年龄的增长而下降。比如说，到60岁的时候，多数人失去了他们40％的嗅觉能力和50％的味觉能力”。sensible意为“明智的，合情理的”，senseless意为“失去知觉的，不省人事的”，sensitive意为“敏感的”，sensory意为“感觉的，传递感觉的”。根据语境，应为感官能力随着年龄的增长而下降。故选D。

  • 第18题：

    共用题干
    Most Adults in US Have Low Risk of Heart Disease
    More than 80 percent of US adults have a less than 10-percent risk of developing heart disease in the next 10 years,according to a report in the Journal of the American College of Cardiology.Just 3 percent have a risk that exceeds 20 percent.
    "I hope that these numbers will give physicians,researchers,health policy analysts,and others a better idea of how coronary heart disease is distributed in the US population,"lead author Dr.Earl S.Ford,from the Centers for Disease Control and Prevention in Atlanta,said in a statement.
    The findings are based on analysis of data from 13,769 subjects,between 20 and 79 years of age,who narticipated in the Third National Health and Nutrition Examination Survey from 1988 to 1994.
    Overall,82 percent of adults had a risk of less than 10 percent,15 percent had a risk that fell between 10 to 20 percent,and 3 percent had a risk above 20 percent.
    The proportion of subjects in the highest risk group increased with advancing age,and men were more likely than women to be in this group.By contrast,race or ethnicity had little effect on risk distributions.
    Although the report suggests that most adults have a low 10-year risk of heart disease,a large proportion have ahigh or immediate risk,Dr.Daniel S.Berman,from Cedars-Sinai Medical Center in Los Angeles,and Dr.Nathan D.Wong,from the University of California at Irvine,note in a related editorial.
    Aggressive treatment measures and public health strategies are needed to shift the overall population risk downward,they add.

    According to the passage,which of the following may contribute to the risk of getting heart disease?
    A:Age.
    B:Ethnicity.
    C:Race.
    D:Citizenship.

    答案：A
    解析：
    由文章第四段可知，15%的美国成年人有10%到20%的患心脏病风险几率。
    由文章第五段可知，受试者中最具心脏病风险的群体比例会随着年龄的增加而增加，而人种和种族对此几乎无影响。国别在此并未提及。
    由文章第三段可知，这些发现是基于从13 769位受试者中得到的数据进行分析的结果，故选B。
    文章最后一段中提到，需要有积极的治疗方法和公共卫生策略来降低人口总体的患心脏病风险。
    本文的开头便引出了文章论述的主题：More than 80 percent of US adults have a less than10-percent risk of developing heart disease in the next 10 years，之后的内容都围绕此论题展开，故选A。

  • 第19题：

    下列SQL语句中，能够完成求某列最大值的是（）。

    ASELECT AVG（Age） FROM Student

    BSELECT MAX（Age） FROM Student

    CSELECT MIN（Age） FROM Student

    DSELECT COUNT（*） FROM Student


    B
    略

  • 第20题：

    数据库中有一张表名称为Student，有列Name，Age，IDCard，Sex。要求写SQL语句查询出表中年龄介于20和30岁之间的数据，下列哪个SQL语句是正确的？（）

    • A、Select* From Student Where Age>=20 ANDAge>=30
    • B、Select* From Student Where Age>=20 ANDAge<=30
    • C、Select* From Student Where Age BET WENN 20AND30
    • D、Select* From Student Where Age>=20&&Age>=30"

    正确答案:A,C

  • 第21题：

    单选题
    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 age>20and age<23

    B

    select*from xsb where age between20 and 23

    C

    select sname，age from xsb where agebetween20 and 23


    正确答案： C
    解析： 暂无解析

  • 第22题：

    单选题
    Given the following query:SELECT last_name, first_name, age, hire_date FROM employee WHERE age > 40Which of the following clauses must be added to return the rows sorted by AGE, oldest first, and by LAST_NAME, from A to Z?（）
    A

    SORT BY age ASC, last_name

    B

    SORT BY age DESC, last_name

    C

    ORDER BY age DESC, last_name

    D

    ORDER BY age ASC, last_name


    正确答案： B
    解析： 暂无解析

  • 第23题：

    单选题
    在C#中〃下列代码的运行结果是（）。int[]age1=newint[]{10，20}；int[]age2=age1；age2[1]=30；Console.WriteLine（age1[1]）；
    A

    0

    B

    10

    C

    20

    D

    30


    正确答案： A
    解析： 暂无解析

  • 第24题：

    问答题
    Do at least 20 percent of the people in country X who are over the age of 25 possess a college diploma?　 (1) In country X, among the population over the age of 25, 26 percent of the male population and 16 percent of the female population possess college diplomas.　 (2) In country X, women account for 55 percent of the total population.

    正确答案： E
    解析：
    因为无法判断X国家的性别比例，故条件1无法回答问题；条件2中未涉及得到文凭的女性人数，故也不能推断出答案；将两者综合来看，也无法推断出答案，故本题选E项。

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