A、unless
B、if
C、as
D、when
更多“One cannot learn a foreign language well（）he studies hard.”相关的问题
A、A.cannot be nested B、B.manipulate data items C、C.act on each row returned D、D.return one result per row E、E.accept only one argument and return only one value F、F.accept arguments which can be a column or an expression
A、cannot be nested B、manipulate data items C、act on each row returned D、return one result per row E、accept only one argument and return only one value F、accept arguments which can be a column or an expression
A、cannot be nested B、manipulate data items C、act on each row returned D、return one result per row E、accept only one argument and return only one value F、accept arguments which can be a column or an expression
A、Routes learned using any IP routing protocol can only be redistributed into non IP routing protocols. B、OSPF can import routes learned using EIGRP, RIP, and IS - IS. C、OSPF routes cannot be exported into EIGRP, RIP, an d IS - IS. D、At the interdomain level, OSPF cannot import routes learned using BGP. E、OSPF routes can be exported into BGP.
A、R1 can learn EIGRP routes from R2, but R2 cannot learn EIGRP routes from R1 B、R1 can send IP packets to R2, but R2 cannot send IP packets to R1 C、R2 no longer learns EIGRP routes from R1 for routes not connected to R1 D、R1 no longer replies to R2's Query messages E、R2n o longer sends to R1 Query messages
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.
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.
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.
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.
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