【判断题】高压压力开关一般安装在储液干燥器与膨胀阀之间的高压管路或直接装在储液干燥器上,其作用是防止制冷系统在异常高压下工作。若制冷系统高压侧压力过高,它将自动切断电磁离合器回路,使压缩机停机,保护制冷系统零部件特别是压缩机不被损坏。
【单选题】According to Weiss, when choosing a strategy, negotiators should
A.
choose one strategy and stick with it throughout the entire negotiation.
B.
be aware of their own culture, but minimize the other culture's norms.
C.
not try to predict or influence the other party's approach.
D.
understand the specific factors in the current relationship.
E.
Weiss states that negotiators should do all of the above when preparing for negotiations.
【单选题】根据《在用工业管道定期检验规程》,对安全保护装置的停机检查,错误的是()。
【单选题】在 SQL Server 2008中,删除数据表Student_Info的正确的Transact-SQL语句是______。
A.
DELETE TABLE Student_Info
B.
DELETE FROM Student_Info
C.
DROP TABLE Student_Info
D.
DROP FROM Student_Info
【单选题】数控机床手动数据输入模式选择开关为( )
【单选题】紧急切断阀是一种特殊结构和特殊用途的阀门,它通常与截止阀串联安装在紧靠容器的介质( )管道上,以便在管道发生大量泄漏时进行紧急止漏;一般还具有过流闭止及超温闭止的性能,并能在近程和远程独立进行操作。