【单选题】在液相色谱中, 范氏方程中的哪一项对柱效能的影响可以忽略不计?
【单选题】Which command is used to drop a constraint?
A.
ALTER TABLE MODIFY CONSTRAINT
D.
ALTER TABLE DROP CONSTRAINT
【单选题】Which syntax turns an existing constraint on?()
A.
ALTER TABLE table_name ENABLE constraint_name;
B.
ALTER TABLE table_name STATUS = ENABLE CONSTRAINT constraint_name;
C.
ALTER TABLE table_name ENABLE CONSTRAINT constraint_name;
D.
ALTER TABLE table_name STATUS ENABLE CONSTRAINT constraint_name;
E.
ALTER TABLE table_name TURN ON CONSTRAINT constraint_name;
【单选题】Cooling enables the engine metals _____ their mechanical properties.
【简答题】预算约束(budget constraint)
【判断题】The dual constraint of a slack constraint is a binding constraint.
【简答题】借贷制约(borrowing constraint)
【单选题】在液相色谱中,范氏方程中的哪一项对柱效的影响可以忽略
【单选题】模块不是一个独立的程序,可以为模块开发驱动程序模块和(或)存根程序模块,用于()测试。