更多“70  A  good            B  col              C  out-of-door  ”相关问题
  • 第1题:

    Bootstrap的网格布局系统的显示中,超小显示设备手机(<768px)的列宽设置的类名前缀为()。

    A、col-xs-*

    B、col-sm-*

    C、col-lg-*

    D、col-md-*


    参考答案:A

  • 第2题:

    The following statements:CREATE TABLE t1 (col1 INT NOT NULL, PRIMARY KEY(col1)); CREATE TABLE t2 (col1 INT NOT NULL, col2 CHAR(1) NOT NULL, PRIMARY KEY (col1, col2), FOREIGN KEY (col1) REFERENCES t1 (col1) ON DELETE CASCADE ON UPDATE RESTRICT); CREATE TABLE t3 (col1 INT NOT NULL, col2 INT NOT NULL, PRIMARY KEY (col1, col2),FOREIGN KEY (col1) REFERENCES t1 (col1) ON DELETE NO ACTION ON UPDATE RESTRICT);INSERT INTO t1 VALUES (1), (2); INSERT INTO t2 VALUES (1, ‘a‘), (1, ‘b‘), (2,‘c‘); INSERT INTO t3 VALUES (1, 100), (2, 200), (2,300);How many rows will be deleted by the following DELETE statement? DELETE FROM t1 WHERE col1= 1;()

    A.4

    B.3

    C.1

    D.0


    参考答案:D

  • 第3题:

    关于屏幕的尺寸标准,说法错误的是()

    • A、col-sm-* 一般用于大于768的平板
    • B、col-md-* 一般用于大于992的中等屏幕显示器
    • C、col-lg-*用于大于1200的桌面显示器
    • D、col-xs-*用于小于700的手机屏幕

    正确答案:D

  • 第4题:

    If a unique constraint is defined on column COL1 of table TAB1, what are the characteristics of COL1?()

    • A、COL1 will accept NULL values and can be referenced in another table's foreign key specification.
    • B、COL1 will not accept NULL values and cannot be referenced in another tables foreign key specification.
    • C、COL1 will not accept NULL values and can be referenced in another tables foreign key specification.
    • D、COL1 will accept NULL values and cannot be referenced in another tables foreign key specification.

    正确答案:C

  • 第5题:

    对于表A(col1 int,col2 char(1)),表B(col1 int,col2char(1)),为确保表A的数据全部被保留,下面正确的联接方式是()

    • A、A inner join B
    • B、A left join B
    • C、A right join B
    • D、Across join B

    正确答案:B

  • 第6题:

    关于栅格系统,哪些是正确的()

    • A、col-sm-*
    • B、col-xs-*
    • C、col-md-*
    • D、col-lg-*

    正确答案:A,B,C,D

  • 第7题:

    对于表A(col1 int,col2 char(1))更新col1=1的数据col2值为N,下面语句正确的是()

    • A、update table A setcol2=’N’ where col1=1
    • B、modify table A setcol2=N where col1=1
    • C、update A set col2=’N’ where col1=1
    • D、modify A set col2=N where col1=1

    正确答案:D

  • 第8题:

    存在两个结构相同的数据库表T1(col1,col2,col3)、T2(col1,col2,col3),写出一SQL语句将所有T1数据导入到T2表()

    • A、select col1,col2,col3 from T1 into T2(col1,col2,col3)
    • B、insert T1 (col1,col,col3) into T2(col1,col2,col3)
    • C、insert into T2 (col1,col2,col3) as select col1,col2,col3 from T1
    • D、insert into T2(col1,col2,col3) select col1,col2,col3 from T1;

    正确答案:D

  • 第9题:

    Bootstrap响应式栅格布局系统中,以下表示列偏移的是()。

    • A、col-md-*
    • B、col-sm-*
    • C、col-sm-offset-*
    • D、col-xs-*

    正确答案:C

  • 第10题:

    单选题
    存在两个结构相同的数据库表T1(col1,col2,col3)、T2(col1,col2,col3),写出一SQL语句将所有T1数据导入到T2表()
    A

    select col1,col2,col3 from T1 into T2(col1,col2,col3)

    B

    insert T1 (col1,col,col3) into T2(col1,col2,col3)

    C

    insert into T2 (col1,col2,col3) as select col1,col2,col3 from T1

    D

    insert into T2(col1,col2,col3) select col1,col2,col3 from T1;


    正确答案: B
    解析: 暂无解析

  • 第11题:

    多选题
    Given two collection objects referenced by col1 and col2,which of these statements are true?()
    A

    The operation col1.retainAll(col2) will not modify the col1 object.

    B

    The operation col1.removeAll(col2) will not modify the col2 object.

    C

    The operation col1.addAll(col2) will return a new collection object, containing elements from both col1      and col2.

    D

    The operation col1.containsAll(Col2) will not modify the col1 object.


    正确答案: C,B
    解析: 暂无解析

  • 第12题:

    单选题
    The following statements: CREATE TABLE t1 (col1 INT NOT NULL, PRIMARY KEY(col1)); CREATE TABLE t2 (col1 INT NOT NULL, col2 CHAR(1) NOT NULL, PRIMARY KEY (col1, col2), FOREIGN KEY (col1) REFERENCES t1 (col1) ON DELETE CASCADE ON UPDATE RESTRICT); CREATE TABLE t3 (col1 INT NOT NULL, col2 INT NOT NULL, PRIMARY KEY (col1, col2),FOREIGN KEY (col1) REFERENCES t1 (col1) ON DELETE NO ACTION ON UPDATE RESTRICT);INSERT INTO t1 VALUES (1), (2); INSERT INTO t2 VALUES (1, 'a'), (1, 'b'), (2,'c'); INSERT INTO t3 VALUES (1, 100), (2, 200), (2,300); How many rows will be deleted by the following DELETE statement? DELETE FROM t1 WHERE col1= 1;()
    A

    4

    B

    3

    C

    1

    D

    0


    正确答案: A
    解析: 暂无解析

  • 第13题:

    Giventwocollectionobjectsreferencedbycol1andcol2,whichofthesestatementsaretrue?()

    A.Theoperationcol1.retainAll(col2)willnotmodifythecol1object.

    B.Theoperationcol1.removeAll(col2)willnotmodifythecol2object.

    C.Theoperationcol1.addAll(col2)willreturnanewcollectionobject,containingelementsfrombothcol1 andcol2.

    D.Theoperationcol1.containsAll(Col2)willnotmodifythecol1object.


    参考答案:B, D

  • 第14题:

    Alport综合征的基因突变不包括

    A.COL4A4
    B.编码Ⅳ型胶原A链的基因突变
    C.COL4A3
    D.COL4A5
    E.NPHSl

    答案:E
    解析:

  • 第15题:

    A view is created with the following statement:CREATE VIEW v1 AS SELECT col1, col2, col3, col4 FROM t1 WHERE col4 > 1000 WITH CHECK OPTIONWhat is the effect of the CHECK OPTION clause?()

    • A、Any row inserted or updated through view V1 must meet the condition that col4 > 1000.
    • B、From now on, any row inserted or updated in table T1 must meet the condition that col4 > 1000, but existing rows in the table are not checked.
    • C、At view creation, DB2 will check the data in table T1, and if in any row doesn't meet the condition col4 > 1000, the view creation will be rejected.
    • D、Any row inserted or updated through view V1 must meet the condition that col4 > 1000 and no row in table T1 can be updated such that col4 <= 1000, but new rows in the table can be inserted with col4 <= 1000.

    正确答案:A

  • 第16题:

    Alport综合征的基因突变不包括()

    • A、NPHS1
    • B、COL4A3
    • C、COL4A4
    • D、COL4A5
    • E、编码Ⅳ型胶原A链的基因突变

    正确答案:A

  • 第17题:

    能在1024的windows机器上显示8列而在肾6手机上显示12列的是()

    • A、col-md-8 col-xs-12
    • B、col-lg-8 col-sm-12
    • C、col-md-8 col-sm-12
    • D、col-lg-8 col-xs-12

    正确答案:A

  • 第18题:

    关于嵌套列的用法,错误的是()

    • A、<div class=“row”><br><div class=“col-sm-1”>
    • B、<div class=“col-sm-1”><br><div class=“row”><br> 
    • C、<div class=“row”><br><div class=“container”><br><div class=“col-xs-1”><br> 
    • D、<div class=“container”><br><div class=“row”><br><div class=“col-xs-1”>

    正确答案:C

  • 第19题:

    Alport综合征的基因突变不包括()

    • A、NPHSl
    • B、COL4A3
    • C、COL4A4
    • D、COL4A5
    • E、编码Ⅳ型胶原A链的基因突变

    正确答案:A

  • 第20题:

    Given two collection objects referenced by col1 and col2,which of these statements are true?()

    • A、The operation col1.retainAll(col2) will not modify the col1 object.
    • B、The operation col1.removeAll(col2) will not modify the col2 object.
    • C、The operation col1.addAll(col2) will return a new collection object, containing elements from both col1      and col2.
    • D、The operation col1.containsAll(Col2) will not modify the col1 object.

    正确答案:B,D

  • 第21题:

    单选题
    对于表A(col1 int,col2 char(1)),表B(col1 int,col2char(1)),为确保表A的数据全部被保留,下面正确的联接方式是()
    A

    A inner join B

    B

    A left join B

    C

    A right join B

    D

    Across join B


    正确答案: B
    解析: 暂无解析

  • 第22题:

    单选题
    对于表A(col1 int,col2 char(1))更新col1=1的数据col2值为N,下面语句正确的是()
    A

    update table A setcol2=’N’ where col1=1

    B

    modify table A setcol2=N where col1=1

    C

    update A set col2=’N’ where col1=1

    D

    modify A set col2=N where col1=1


    正确答案: C
    解析: 暂无解析

  • 第23题:

    单选题
    A view is created with the following statement:CREATE VIEW v1 AS SELECT col1, col2, col3, col4 FROM t1 WHERE col4 > 1000 WITH CHECK OPTIONWhat is the effect of the CHECK OPTION clause?()
    A

    Any row inserted or updated through view V1 must meet the condition that col4 > 1000.

    B

    From now on, any row inserted or updated in table T1 must meet the condition that col4 > 1000, but existing rows in the table are not checked.

    C

    At view creation, DB2 will check the data in table T1, and if in any row doesn't meet the condition col4 > 1000, the view creation will be rejected.

    D

    Any row inserted or updated through view V1 must meet the condition that col4 > 1000 and no row in table T1 can be updated such that col4 <= 1000, but new rows in the table can be inserted with col4 <= 1000.


    正确答案: A
    解析: 暂无解析