Presentation
Practice
Production
Preparation
第1题：
What equipment can be used to load cargo?
第2题：
Consider the query:Mysql＞ SET @run = 15;Mysql＞ EXPLAIN SELECT objective, stage, COUNT (stage)FROM iteminformationWHERE run=@run AND objective=’7.1’GROUP BY objective,stageORDER BY stage;The iteminformation table has the following indexes;Mysql＞ SHOW INDEXES FROM iteminformation:This query is run several times in an application with different values in the WHERE clause in a growing data set.What is the primary improvement that can be made for this scenario?（）
A.Do not pass a user variable in the WHERE clause because it limits the ability of the optimizer to use indexes
B.Add an index on the objective column so that is can be used in both the WHERE and GROUP BY operations
C.Drop the run_2 index because it has caused a conflict in the choice of key for this query
D.Execute the run_2 index because it has caused a conflict in the choice of key for this query
E.Add a composite index on (run,objective,stage) to allow the query to fully utilize an index
第3题：
An activity has an early start date-of the lOth and a late start date of the 19th. The activity also has a duration of 4 days. There are no nonworkdays. From the information given, （）what can be concluded about the activity?
A.Total float for the activity is 9 days.
B.The early finish date ofthe activity is the end ofthe day on the 14th.
C.The late finish date is the 25th.
D.The activity can be completed in 2 days ifthe resources devoted to it are doubled.
第4题：
第5题：
第6题：
What can be used to cover bilge before loading?
第7题：
A.Journal
B.Task Center
C.Activity Monitor
D.Command Line Processor
第8题：
A. Linguistic competence and discourse competence
B. Discourse competence
C. Communicative competence
D. Linguistic competence
第9题：
第10题：