教师为什么要进行课堂观察与课例研究？
A system administrator has been instructed to attach storage in their client LPARs, in a Power 770, with fibre channel adapters using N_port ID virtualization (NPIV). Which of the following partitions has the minimum requirements to utilize virtual fibre channel?（） ["LPAR-A with 1Gb FC HBA and SAN connection","LPAR-B with 2Gb FC HBA and SAN connection","LPAR-C with 4Gb FC HBA and SAN connection","LPAR-D with 8Gb FC HBA and SAN connectio"]
如果某税收使低收入家庭比高收入家庭承受更大的负担，那么该税收就是（）。 ["“累进的”","“累退的”","“固定比例的”","“固定税额的&rdquo"]
A customer wants to have employees work from remote locations as well as in the office. All communications must be secure and files must be protected from access by unauthorized people. The employee’s applications （database inserts and reads） are only accessed with a web browser. Which of the following capabilities is necessary？（） ["SSL","PGP","File encryption program","Public key encryptio"]
无形资产能存在于其载体的前提是（）。 ["能带来正常的利润","能带来超额利润","能带来垄断利润","能带来潜在利润"]
主要病征类型：
