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【单选题】

Which description best characterizes the Cisco mobility solution? （）

A、provides high-level integrated security from the wireless access point to the client and automatically encrypts voice and data in transit

B、authenticates users and devices so that it is impossible for a rogue device to be connected to the network

C、allows you to centralize management, automate repetitive tasks, and provision IP services easily

D、centralizes your infrastructure and allows you to share resources more effectively by combining separate data centers into an interconnected SAN

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第1题
[单选题] Tell me（），please.

A、which hatch will be loaded first  B、will which hatch be loaded first  C、will hatch of which be loaded first  D、first will which hatch be loaded  

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第2题
[] Tell me（）, please.

A、A.which hatch will be loaded first  B、B.will which hatch be loaded first  C、C.will hatch of which be loaded first  D、D.first will which hatch be loaded  

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第3题
[单选题] You need to change the definition of an existing table. The COMMERCIALS table needs its DESCRIPTION column changed to hold varying length characters up to 2000 bytes. The column can currently hold 1000 bytes per value. The table contains 20000 rows.Which statement is valid?（）

A、ALTER TABLE commercials MODIFY (description CHAR2(2000));  B、ALTER TABLE commercials CHANGE (description CHAR2(2000));  C、ALTER TABLE commercials CHANGE (description VARCHAR2 (2000));  D、ALTER TABLE commercials MODIFY (description VARCHAR2 (2000));  E、You cannot increase the size of a column if the table has rows.  

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第4题
[单选题] You need to change the definition of an existing table. The COMMERCIALS table needs its DESCRIPTION column changed to hold varying length characters up to 2000 bytes. The column can currently hold 1000 bytes per value. The table contains 20000 rows. Which statement is valid?（）

A、ALTER TABLE commercials MODIFY (description CHAR2(2000));  B、ALTER TABLE commercials CHANGE (description CHAR2(2000));  C、ALTER TABLE commercials CHANGE (description VARCHAR2(2000));  D、ALTER TABLE commercials MODIFY (description VARCHAR2(2000));  E、You cannot increase the size of a column if the table has rows.  

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第5题
[单选题] You need to change the definition of an existing table. The COMMERCIALS table needs its DESCRIPTION column changed to hold varying length characters up to 2000 bytes. The column can currently hold 1000 bytes per value. The table contains 20000 rows. Which statement is valid?（）

A、ALTER TABLE commercials MODIFY (description CHAR2(2000));  B、ALTER TABLE commercials CHANGE (description CHAR2(2000));  C、ALTER TABLE commercials CHANGE (description VARCHAR2 (2000));  D、ALTER TABLE commercials MODIFY (description VARCHAR2 (2000));  E、You cannot increase the size of a column if the table has rows.  

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第6题
[] You need to change the definition of an existing table. The COMMERCIALS table needs its DESCRIPTION column changed to hold varying length characters up to 1000 bytes. The column can currently hold 500 bytes per value. The table contains 20000 rows. Which statement is valid?（）

A、A.ALTER TABLE commercials MODIFY (description CHAR2(1000));  B、B.ALTER TABLE commercials CHANGE (description CHAR2(1000));  C、C.ALTER TABLE commercials CHANGE (description VARCHAR2(1000));  D、D.ALTER TABLE commercials MODIFY (description VARCHAR2(1000));  E、E.You cannot increase the size of a column if the table has rows.  

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第7题
[单选题] Line throwing apparatus aboard ship must contain（）.

A、two rockets，one of which shall be the buoyant type  B、three rockets，one of which shall be the buoyant type  C、four rockets，two of which shall be the buoyant type  D、five rockets，two of which shall be the buoyant type  

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第8题
[单选题] The frequency（）the safety message will be transmitted shall be included in DSC safety call.

A、which  B、on which  C、at which  D、in which  

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第9题
[] 比率分析应当选择的操作菜单是（）

A、A.Analyze→Descriptive Statistics→Frequencies  B、B.Analyze→Descriptive Statistics→Descriptives  C、C.Analyze→Descriptive Statistics→Crosstabs  D、D.Analyze→Descriptive Statistics→Ratio  

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第10题
[] 交叉分组下频数分析应选择的菜单是（）

A、A.Analyze→Descriptive Statistics→Frequencies  B、B.Analyze→Descriptive Statistics→Descriptives  C、C.Analyze→Descriptive Statistics→Crosstabs  D、D.Analyze→Descriptive Statistics→Ratio  

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