A customer has two separate storage islands and is planning to implement an SVC to provide forFlashCopy between the two islands. What is the minimum number of inter-switch links （ISLs） thatare required？（） ["0","1","2","4"]
世界城市研究的主要内容是什么？
You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty. Which statement accomplishes this task?（） [" ALTER TABLE students ADD PRIMARY KEY _ id;"," ALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student_id);"," ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY student_id;"," ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY (student_id);"," ALTER TABLE students MODIFY CONSTRAINT stud_id_pk PRIMARY KEY (student_id)"]
报告中指出：以公共性、民主主义、卓越性三大原理作为（）的哲学。将校长的办学理念转化为全校教职员工的共识，是学习型组织建设的（）。
下列关于给水系统的描述中，错误的是（）。 ["给水系统一般由给水泵.给水管道和阀门组成","按水源种类可将给水系统分为地表水和地下水给水系统","按使用目的可将给水系统分为生活用水.生产用水和消防给水系统","镀锌钢管.不锈钢管.PPR管等是目前建筑给水的主要管材","PVC材质的给水管目前在我国广泛使用"]
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