回答“1／3＋2／5＝？”“将‘Wegotoschoolyesterday’改成合适的时态”等问题，需要哪些知识？（） 陈述性知识。 程序性知识。 情景性知识。 概念性知识。
A view is created with the following statement:CREATE VIEW v1 AS SELECT col1, col2, col3, col4 FROM t1 WHERE col4 > 1000 WITH CHECK OPTIONWhat is the effect of the CHECK OPTION clause?（） Any row inserted or updated through view V1 must meet the condition that col4 > 1000.。 From now on, any row inserted or updated in table T1 must meet the condition that col4 > 1000, but existing rows in the table are not checked.。 At view creation, DB2 will check the data in table T1, and if in any row doesn't meet the condition col4 > 1000, the view creation will be rejected.。 Any row inserted or updated through view V1 must meet the condition that col4 > 1000 and no row in table T1 can be updated such that col4 <= 1000, but new rows in the table can be inserted with col4 <= 1000.。
发展（）和（）的技能技巧。
解释vensys变桨工作有几种模式,每种模式下工作工作条件分别是什么?
A customer’s new rack contains 12 x p655 servers. The customer currently has an HMC with one 128-port async adapter with a rack mounted 16-port RAN. The HMC is already attached to two pSeries p630s. What upgrades， if any， are needed to the HMC to support the new p655 servers？（） No upgrades are needed.。 Add another 16-port RAN.。 Add an 8-port async adapter.。 Add an additional 128-port adapter.。
凡是能够储集石油和天然气，并在其中（）的岩层称为储集层
