用户供电压三相不对称不得超过（）。 ["1％","5％","10％","15％"]
Your SPFILE contains the following parameter settings： SGA_TARGET = 8G DB_CACHE_SIZE = 4G SHARED_POOL_SIZE = 2G LARGE_POOL_SIZE = 512M JAVA_POOL_SIZE = 512M LOG_BUFFER = 100M SGA_MAX_SIZE = 10G You query the V$SGA_DYNAMIC_COMPONENTS dynamic performance view and discover that the large pool component is currently sized at 1G. You want the value of the SGA_TARGET initialization parameter to 10G， but instead of specifying a value of 10G for the SGA_TARGET initialization parameter， you erroneously execute the following statement： SQL>ALTER SYSTEM SET SGA_TARGET = 0 SCOPE = BOTH； What is the result of this statement？（） [" The database crashes."," The large pool releases 512M of memory."," The large pool retains 1G of allocated memory."," The large pool increases to 1，512M of memory."]
灌水量：
An industrial sector customer has requested an IBM System x3755 for a high performance computing application. Pricing is the most sensitive decision factor for this customer. They are looking for an entry-level storage solution because the application needs to access about 12 TB of data， with an expected future growth of 10-15 percent. As this is the only server accessing this amount of data， the customer does not want to have a SAN. What should the System x Sales Specialist recommend？ （） ["DS3300 iSCSI-based solution","One MegaRAID 8480 card with four EXP3000 units","DS4000 Fibre Channel solution with EXP810 expansion units","DS3400 Fibre Channel solutionWArialZ"]
截流前验收的主要工作（）。 ["A.检查已完成的水下工程、隐蔽工程、导流截流工程的建设情况，鉴定工程质量 ","B.审查截流方案，检查截流措施和准备工作落实情况 ","C.检查建设征地、移民迁移安置和库底清理情况，以及为解决碍航等问题而采取的临时措施落实情况 ","D.确定可以进行交接的工程项目E.研究验收中发现的其他问题，并提出处理要求"]
大肠杆菌有什么特征？
