Compared with last year, the output of the factory this year has increased（）20%...

第1题

[单选题] （）the number of paid holidays enjoyed by most employees in the company, three weeks of vacation seems generous.

A、Compared with B、Compared C、Comparing with D、Comparing

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第2题

[单选题] 下列赋值语句（）是有效的。

A、sum=sum-sum B、x+2=x+2 C、x+y=sum D、last=y / 0

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第3题

[填空题] I （） to see a film with my brother last night. (【go】　　我昨晚和哥哥去看电影了。

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第4题

[] Examine the description of the EMPLOYEES table: EMP_ID NUMBER(4) NOT NULL LAST_NAME VARCHAR2(30) NOT NULL FIRST_NAME VARCHAR2(30) DEPT_ID NUMBER(2) Which statement produces the number of different departments that have employees with last name Smith?（） Examine the description of the EMPLOYEES table: EMP_ID NUMBER(4) NOT NULL LAST_NAME VARCHAR2(30) NOT NULL FIRST_NAME VARCHAR2(30) DEPT_ID NUMBER(2) Which statement produces the number of different departments that have employees with last name Smith?（）

A、A. SELECT COUNT (*) FROM employees WHERE last _name='smith'; B、B. SELECT COUNT (dept_id) FROM employees WHERE last _name='smith'; C、C. SELECT DISTINCT (COUNT (dept_id) FROM employees WHERE last _name='smith'; D、D. SELECT COUNT (DISTINCT dept_id) FROM employees WHERE last _name='smith'; E、E. SELECT UNIQE (dept_id) FROM employees WHERE last _name='smith';

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第5题

[] Examine the description of the EMPLOYEES table: EMP_ID NUMBER(4) NOT NULL LAST_NAME VARCHAR2(30) NOT NULL FIRST_NAME VARCHAR2(30) DEPT_ID NUMBER(2) Which statement produces the number of different departments that have employees with last name Smith? （） Examine the description of the EMPLOYEES table: EMP_ID NUMBER(4) NOT NULL LAST_NAME VARCHAR2(30) NOT NULL FIRST_NAME VARCHAR2(30) DEPT_ID NUMBER(2) Which statement produces the number of different departments that have employees with last name Smith? （）

A、A. SELECT COUNT (*) FROM employees WHERE last _name='smith'; B、B. SELECT COUNT (dept_id) FROM employees WHERE last _name='smith'; C、C. SELECT DISTINCT (COUNT (dept_id) FROM employees WHERE last _name='smith'; D、D. SELECT COUNT (DISTINCT dept_id) FROM employees WHERE last _name='smith'; E、E. SELECT UNIQE (dept_id) FROM employees WHERE last _name='smith';

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第6题

[] Examine the description of the EMPLOYEES table: EMP_ID NUMBER(4) NOT NULL LAST_NAME VARCHAR2(30) NOT NULL FIRST_NAME VARCHAR2(30) DEPT_ID NUMBER(2) Which statement produces the number of different departments that have employees with last name Smith?（） Examine the description of the EMPLOYEES table: EMP_ID NUMBER(4) NOT NULL LAST_NAME VARCHAR2(30) NOT NULL FIRST_NAME VARCHAR2(30) DEPT_ID NUMBER(2) Which statement produces the number of different departments that have employees with last name Smith?（）

A、A.SELECT COUNT(*) FROM employees WHERE last_name='Smith'; B、B.SELECT COUNT(dept_id) FROM employees WHERE last_name='Smith'; C、C.SELECT DISTINCT(COUNT(dept_id)) FROM employees WHERE last_name='Smith'; D、D.SELECT COUNT(DISTINCT dept_id) FROM employees WHERE last_name='Smith'; E、E.SELECT UNIQUE(dept_id) FROM employees WHERE last_name='Smith';

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第7题

[多选题] In which two aspects does hot patching differ from conventional patching?（）

A、It consumes more memory compared with conventional patching. B、It can be installed and uninstalled via OPatch unlike conventional patching. C、It takes more time to install or uninstall compared with conventional patching. D、It does not require down time to apply or remove unlike conventional patching. E、It is not persistent across instance startup and shutdown unlike conventional patching.

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第8题

[单选题] The difference between Fixed pitch propeller (FPP) and Controllable pitch propeller (CPP) is in that（）

A、for FP, once fitted, the position of the blades can also be changed in operation B、for CP, once fitted, the position of the blades can also be changed in operation C、the CP type has a relatively smaller hub compared with the FP propellers D、the FP type has a relatively larger hub compared with the CP propellers

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第9题

[] The phrase "feed off" in the last paragraph means （）.

A、A. depend on B、B. compete with C、C. fight with D、D. kill off

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Compared with last year, the output of the factory this year has increased（）20%.

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