赤潮和水华
①本为自然现象：
赤潮（red tide）是海洋中某些微小（2-20微米）的浮游藻类、原生动物或更小的细菌，在满足一定的条件下爆发性繁殖或突然性聚集，引起水体变色的一种自然生态现象。
"水华"（water blooms）是一种在淡水中的自然生态现象，只是仅由藻类引起的，如蓝藻（严格意义上应称为蓝细菌）、绿藻、硅藻等。"水华"发生时，水一般呈蓝色或绿色。这两种在自然界就有的赤潮和"水华
"现象，在我国古代历史上就有记载。在自然界中它们很快消失，并没有给水产动物和人类带来危害。
②发展为灾害：由于人类经济的发展，对大自然造成了许多干扰，最主要的是N、P营养成分的增加，造成淡水、海水的富营养化，为水中这些微小生物的爆发性生长提供了十分有利的条件。在赤潮消失期，赤潮生物大量死亡和分解，耗尽了水中的溶解氧，分解物产生大量的有害气体，恶臭难闻，严重威胁海洋养殖业和
旅游业的发展。同样地，淡水中富营养化后，"水华"频繁出现，面积逐年扩散，持续时间逐年延长。太湖、滇池、巢湖、洪泽湖都有"水华"，就连流动的河流，如长江最大支流----汉江下游汉口江段中也出现"水华"。淡水中"水华"造成的最大危害是：饮用水源受到威胁，藻毒素通过食物链影响人类的健康，蓝藻"水华
"的次生代谢产物MCRST能损害肝脏，具有促癌效应，直接威胁人类的健康和生存。由此可见，一个是海洋中，另一个是淡水中；一种是某些微小（2-20微米）的浮游藻类、原生动物或更小的细菌引起水体变色，另一种是仅由藻类引起的，如蓝藻（严格意义上应称为蓝细菌）、绿藻、硅藻。
阅读完上面的材料结合学过的知识回答以下问题。
赤潮带来的危害有哪些？
You support Oracle Database 12c Oracle Database 11g, and Oracle Database log on the same server. All databases of all versions use Automatic Storage Management (ASM). Which three statements are true about the ASM disk group compatibility attributes that are set for a disk group?（） [" The ASM compatibility attribute controls the format of the disk group metadata."," RDBMS compatibility together with the database version determines whether a database Instance can mount the ASM disk group."," The RDBMS compatibility setting allows only databases set to the same version as the compatibility value, to mount the ASM disk group."," The ASM compatibility attribute determines some of the ASM features that may be used by the Oracle disk group."," The ADVM compatibility attribute determines the ACFS features that may be used by the Oracle 10g database."]
企业所采取的全部营销策略、手段必须以（）为基础，最大限度地迎合消费者的需求、欲望、消费习惯、购买能力等。 ["消费者行为","消费者心理","消费者心理与行为","消费者偏好"]
A customer needs to implement a Highly Available solution for JMS that has a primary data center and a backup. Which three steps would you perform when designing your solution?（） ["Store Transaction Logs in a database and use Database stores for JMS to make replication between sites easier.","Use file based Transaction Logs and JMS stores and implement a separate replication solution for files in addition to database in case database replication fails.","Implement Oracle RAC at each site to provide a highly available solution within each datacenter.","Configure Whole Server Migration to migrate WebLogic Managed Servers from the primary to the secondary site.","Configure Automatic Service Migration for JMS high availability within a datacenter."]
语文教育学的性质是（） ["基础理论学科","应用技术学科","既是基础理论学科又是技术应用学科","教育学中的一门学科教育学"]
离心泵内泄漏产生的危害及采取的措施是什么？
