单选题Only one of the following statements is false, according to what was said. Which one is it?A Researchers said estimates of atomic bomb survivors' radiation doses are accurate.B Doubts about the accuracy of methods used to collect exposure data in 1945

题目
单选题
Only one of the following statements is false, according to what was said. Which one is it?
A

Researchers said estimates of atomic bomb survivors' radiation doses are accurate.

B

Doubts about the accuracy of methods used to collect exposure data in 1945 prompted the review.

C

The earlier methods were unable to detect radioactive fallout because the researchers could not get close to the bomb site.

D

The amount of nickel in each copper sample can be correlated to the intensity of radiation exposure at the site.

相似考题

1.●Which one of these statements about connecting to the Internet is true? (68) .(68) A．The Internet can only be used to link computers with same operating systemB．The Internet can be used to connect computers with different ISPC．You must have a telephone line to connect to the InternetD．You must have a modem to connect to the Internet

2.Which three statements are true about SQL plan directives?()A. They are tied to a specific statement or SQL id.B. They instruct the maintenance job to collect missing statistics or perform dynamic sampling to generate a more optimal plan.C. They are used to gather only missing statistics.D. They are created for a query expression where statistics are missing or the cardinality estimates by the optimizer are incorrect.E. They instruct the optimizer to create only column group statistics.F. Improve plan accuracy by persisting both compilation and execution statistics in the SYSAUX tablespace.

3. Which one of the following statements about iPhone X’s FaceID is false according to this article？( ) A.It is a whole new technique Apple Inc.applied on iPhone X.B.It has started a revolution in computer-vision industry.C.It has a problem of revocation.D.It has embedded security mechanisms to secure the data on the phone.

4.Which one of these statements about connecting to the Internet is true?(68).A．The Internet can only be used to link computers with same operating systemB．The Internet can be used to connect computers with different ISPC．You must have a telephone line to connect to the InternetD．You must have a modem to connect to the Internet

参考答案和解析
正确答案： D
解析：
录音首句便指出“对原子弹（atomic bomb）幸存者体内辐射含量（radiation doses）的估测是正确的”，接着提到“对1945年收集数据方法的准确度的怀疑促使了这次的重新估测”，因此选项C内容有误。
【录音原文】
Estimates of atomic bomb survivors’ radiation doses—the basis for current radiation exposure safety standards—are accurate, researchers said Thursday. Doubts about the accuracy of methods used to collect exposure data in 1945, immediately after the bombings in Hiroshima and Nagasaki, prompted the review. The earlier methods were unable to detect radioactive fallout more than a half-mile from each bomb site. The scientists examined copper samples from Hiroshima buildings for trace amounts of a radioactive nickel isotope produced by the atomic bomb explosion. The amount of nickel in each copper sample can be correlated to the intensity of radiation exposure at the site from which the sample was taken.
更多“单选题Only one of the following statements is false, according to what was said. Which one is it?A Researchers said estimates of atomic bomb survivors' radiation doses are accurate.B Doubts about the accuracy of methods used to collect exposure data in 1945 ”相关问题

  • 第1题：

    Which of the following statements about a Sales Catalog is TRUE？（）

    • A、A store can only have one sales catalog.
    • B、A sales catalog is used to bundle similar products.
    • C、A sales catalog may be used to place a product in more than one category.
    • D、Every store must have a sales catalog.

    正确答案:C

  • 第2题：

    Which of the following statements is false？（）

    • A、There can be more than one master catalog for a store
    • B、A sales catalog is a subset of the master catalog
    • C、The master catalog is the central place for the stores merchandise
    • D、There can be more than one sales catalog for a store
    • E、Multiple stores can share a master catalog

    正确答案:A

  • 第3题：

    which one of the following accurately describes field names?（）

    • A、they must be unique in a database  
    • B、they can only be used once in a view  
    • C、they can only used once on each form  
    • D、they can be used mulriple times on a form 

    正确答案:C

  • 第4题：

    Which two statements about bigfile tablespaces are true？ （）

    • A、The bigfile tablespace have only one data file.
    • B、The segment space management is automatic.
    • C、The extent management is dictionary managed.
    • D、The database can have only one bigfile tablespace.
    • E、The bigfile tablespace can be converted to a smallfile tablespace.

    正确答案:A,B

  • 第5题：

    Which two statements are true about simple views？（）

    • A、Views can be created as read only.
    • B、Views are data segments like tables.
    • C、Views can be created on the basis of more than one table.
    • D、Data manipulation language （DML） operations cannot be performed on views.

    正确答案:A,C

  • 第6题：

    Which two statements about subqueries are true? （）

    • A、A single row subquery can retrieve data from only one table.
    • B、A SQL query statement cannot display data from table B that is referred to in its subquery, unless table B is included in the main query's FROM clause.
    • C、A SQL query statement can display data from table B that is referred to in its subquery, without including B in its own FROM clause.
    • D、A single row subquery can retrieve data from more than one table.
    • E、A single row subquery cannot be used in a condition where the LIKE operator is used for comparison.
    • F、A multiple-row subquery cannot be used in an INSERT statement to insert multiple rows at a time.

    正确答案:D,F

  • 第7题：

    单选题
    Which of the following statements about a Master Catalog is FALSE？（）
    A

    The Master Catalog must be a proper tree.

    B

    The product management tools work with a Master Catalog.

    C

    A product cannot belong to more than one category.

    D

    A store may have more than one Master Catalog.


    正确答案： A
    解析： 暂无解析

  • 第8题：

    单选题
    An administrator only has one public IP address that must be shared among five employees. Which of the following network schemes should be used?（）
    A

    SNAT

    B

    SNAP

    C

    NAC

    D

    MPLS


    正确答案： B
    解析： 暂无解析

  • 第9题：

    单选题
    Which of the following statements about a Sales Catalog is TRUE？（）
    A

    A store can only have one sales catalog.

    B

    A sales catalog is used to bundle similar products.

    C

    A sales catalog may be used to place a product in more than one category.

    D

    Every store must have a sales catalog.


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    Only one of the following statements is true, according to what was said. Which one is it?
    A

    The approaches of the three researchers are quite different.

    B

    The three researchers’ approaches are all based on detecting imperfections in the print quality of documents.

    C

    Old-school forensic scientists were unable to trace documents to particular typewriters based on quirks of the individual keys.

    D

    The researchers from Purdue believe the perfect pieces of engineering leave unique patterns of banding in their products.


    正确答案： A
    解析：
    录音首句便指出虽然三位研究人员所采取的方法有稍微的不同，但是“all are based on detecting imperfections in the print quality of documents”，因此选项B与录音内容相符。
    【录音原文】
    Though the approaches of the three researchers differ slightly, all are based on detecting imperfections in the print quality of documents. Old-school forensic scientists were—at least so the movies would have you believe—able to trace documents to particular typewriters based on quirks of the individual keys. The researchers from Purdue employ a similar approach, exploiting the fact that the rotating drums and mirrors inside a printer are imperfect pieces of engineering which leave unique patterns of banding in their products.

  • 第11题：

    多选题
    Which two statements are true about simple views？（）
    A

    Views can be created as read only.

    B

    Views are data segments like tables.

    C

    Views can be created on the basis of more than one table.

    D

    Data manipulation language （DML） operations cannot be performed on views.


    正确答案： D,B
    解析： 暂无解析

  • 第12题：

    多选题
    Which two statements about bigfile tablespaces are true？ （）
    A

    The bigfile tablespace have only one data file.

    B

    The segment space management is automatic.

    C

    The extent management is dictionary managed.

    D

    The database can have only one bigfile tablespace.

    E

    The bigfile tablespace can be converted to a smallfile tablespace.


    正确答案： D,B
    解析： 暂无解析

  • 第13题：

    Which two statements correctly describe the relation between a data file and the logical databasestructures（）

    • A、An extent cannot spread across data files.
    • B、A segment cannot spread across data files.
    • C、A data file can belong to only one tablespace.
    • D、A data file can have only one segment created in it.
    • E、A data block can spread across multiple data files as it can consist of multiple operating system （OS） blocks.

    正确答案:A,C

  • 第14题：

    Which of the following statements about a Master Catalog is FALSE？（）

    • A、The Master Catalog must be a proper tree.
    • B、The product management tools work with a Master Catalog.
    • C、A product cannot belong to more than one category.
    • D、A store may have more than one Master Catalog.

    正确答案:D

  • 第15题：

    Which two statements about subqueries are true? （）

    • A、A subquery should retrieve only one row.
    • B、A subquery can retrieve zero or more rows.
    • C、A subquery can be used only in SQL query statements.
    • D、Subqueries CANNOT be nested by more than two levels.
    • E、A subquery CANNOT be used in an SQL query statement that uses group functions.
    • F、When a subquery is used with an inequality comparison operator in the outer SQL statement, the column list in the SELECT clause of the subquery should contain only one column.

    正确答案:B,F

  • 第16题：

    Which two statements about subqueries are true?（）

    • A、A single row subquery can retrieve data from only one table.
    • B、A SQL query statement cannot display data from table B that is referred to in its subquery, unless table B is included in the main query's FROM clause.
    • C、A SQL query statement can display data from table B that is referred to in its subquery, without including table B in its own FROM clause.
    • D、A single row subquery can retrieve data from more than one table.
    • E、A single row subquery cannot be used in a condition where the LIKE operator is used for comparison.
    • F、A multiple-row subquery cannot be used in a condition where the LIKE operator is used for comparison.

    正确答案:B,D

  • 第17题：

    Which three statements are true regarding single-row functions？（）

    • A、 They can accept only one argument.
    • B、 They can be nested up to only two levels.
    • C、 They can return multiple values of more than one data type.
    • D、 They can be used in SELECT， WHERE， and ORDER BY clauses.  
    • E、 They can modify the data type of the argument that is referenced.
    • F、 They can accept a column name， expression， variable name， or a user-supplied constant as arguments.

    正确答案:D,E,F

  • 第18题：

    Which three statements are true regarding the data types in Oracle Database 10g/11g?（）

    • A、Only one LONG column can be used per table 
    • B、A TIMESTAMP data type column stores only time values with fractional seconds 
    • C、The BLOB data type column is used to store binary data in an operating system file 
    • D、The minimum column width that can be specified for a VARCHAR2 data type column is one 
    • E、The value for a CHAR data type column is blank-padded to the maximum defined column width

    正确答案:A,D,E

  • 第19题：

    单选题
    Which of the following statements is false？（）
    A

    There can be more than one master catalog for a store

    B

    A sales catalog is a subset of the master catalog

    C

    The master catalog is the central place for the stores merchandise

    D

    There can be more than one sales catalog for a store

    E

    Multiple stores can share a master catalog


    正确答案： C
    解析： 暂无解析

  • 第20题：

    多选题
    Which three statements are true about SQL plan directives?（）
    A

    They are tied to a specific statement or SQL id.

    B

    They instruct the maintenance job to collect missing statistics or perform dynamic sampling to generate a more optimal plan.

    C

    They are used to gather only missing statistics.

    D

    They are created for a query expression where statistics are missing or the cardinality estimates by the optimizer are incorrect.

    E

    They instruct the optimizer to create only column group statistics.

    F

    Improve plan accuracy by persisting both compilation and execution statistics in the SYSAUX tablespace.


    正确答案： B,D,E
    解析： 暂无解析

  • 第21题：

    多选题
    Which two statements about subqueries are true? （）
    A

    A single row subquery can retrieve data from only one table.

    B

    A SQL query statement cannot display data from table B that is referred to in its subquery, unless table B is included in the main query's FROM clause.

    C

    A SQL query statement can display data from table B that is referred to in its subquery, without including table B in its own FROM clause.

    D

    A single row subquery can retrieve data from more than one table.

    E

    A single row subquery cannot be used in a condition where the LIKE operator is used for comparison.

    F

    A multiple-row subquery cannot be used in a condition where the LIKE operator is used for comparison.


    正确答案： F,A
    解析： 暂无解析

  • 第22题：

    多选题
    Which two statements about subqueries are true? （）
    A

    A subquery should retrieve only one row.

    B

    A subquery can retrieve zero or more rows.

    C

    A subquery can be used only in SQL query statements.

    D

    Subqueries CANNOT be nested by more than two levels.

    E

    A subquery CANNOT be used in an SQL query statement that uses group functions.

    F

    When a subquery is used with an inequality comparison operator in the outer SQL statement, the column list in the SELECT clause of the subquery should contain only one column.


    正确答案： C,D
    解析： 暂无解析

  • 第23题：

    单选题
    which one of the following accurately describes field names?（）
    A

    they must be unique in a database  

    B

    they can only be used once in a view  

    C

    they can only used once on each form  

    D

    they can be used mulriple times on a form 


    正确答案： C
    解析： 暂无解析

相关内容