A、will have been done
B、was done
C、had been done
D、has done
更多“The work（）by the time you get there.”相关的问题
A、The work of opening and closing hatches is usually done by crew members. B、The work of opening and closing hatch covers is usually done by crew members. C、The work of opening hatch covers is usually done by crew members. D、The work of closing hatch covers is usually done by crew members.
A、The SELECT statement is syntactically accurate. B、The SELECT statement does not work because there is no HAVING clause. C、The SELECT statement does not work because the column specified in the GROUP BY clause is not in the SELECT list. D、The SELECT statement does not work because the GROUP BY clause should be in the main query and not in the subquery.
A、The SELECT statement is syntactically accurate. B、The SELECT statement does not work because there is no HAVING clause. C、The SELECT statement does not work because the column specified in the GROUP BY clause is not in the SELECT list. D、The SELECT statement does not work because the GROUP BY clause should be in the main query and not in the subquery.
A、used to do mechanical work B、used to establish the magnetic field of the motor C、lost as heat generated by the windings D、lost in doing work to turn the motor itself
A、Deleting the records of employees who do not earn commission. B、Increasing the commission of employee 3 by the average commission earned in department 20. C、Finding the number of employees who do NOT earn commission and are working for department 20. D、Inserting into the table a new employee 10 who works for department 20 and earns a commission that is equal to the commission earned by employee 3. E、Creating a table called COMMISSION that has the same structure and data as the columns EMP_ID and COMMISSIONS of the EMP table. F、Decreasing the commission by 150 for the employees who are working in department 30 and earning a commission of more then 800.
A、An application process acquires at least a share lock on the current row of every cursor. B、Any row that is read during a unit of work cannot be changed by other application processes until the unit of work is complete. C、Any row changed by another application process can be read, even if the change has not been committed by that application process. D、An application process that issues the same query more than once in a unit of work will not see additional rows caused by other application processes appending new information to the database.
A、A.deleting the records of employees who do not earn commission B、B.increasing the commission of employee 3 by the average commission earned in department 20 C、C.finding the number of employees who do NOT earn commission and are working for department 20 D、D.inserting into the table a new employee 10 who works for department 20 and earns a commission that is equal to the commission earned by employee 3 E、E.creating a table called COMMISSION that has the same structure and data as the columns EMP_ID and COMMISSION of the EMP table F、F.decreasing the commission by 150 for the employees who are working in department 30 and earning a commission of more than 800
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