You have included the following parameter settings in your SPFILE： SGA_MAX_SIZE=8G SGA_TARGET=6G DB_CACHE_SIZE=2G SHARED_POOL_SIZE=1G LOG_BUFFER=64M DB_KEEP_CACHE_SIZE=960M Which statement is true if you modify the SGA_TARGET initialization parameter？（） The SGA_TARGET initialization parameter cannot be set to a value greater than 8G。 The DB_CACHE_SIZE initialization parameter cannot be set to a value less than 2G。 The DB_CACHE_SIZE initialization parameter cannot be set to a value greater than 2G。 The DB_KEEP_CACHE_SIZE initialization parameter cannot be set to a value greater than 960M 。 The DB_KEEP_CACHE_SIZE initialization parameter cannot be set to a value less than 960M。
【背景资料】某9层住宅项目，某装饰施工单位负责内外装饰装修，装饰内容较多，竣工后不久发现部分楼层水泥砂浆地面大面积起砂、空鼓、裂缝，外墙砖空鼓、脱落等。
请根据背景资料完成相应小题选项水泥砂浆楼地面在水泥砂浆强度达到（）及时进行锯缝。 60%。 75%。 80%。 90%。
You have a server that has very limited memory but has a very large table. You will use mysqldump to back up this table. Which option will ensure mysqldump will process a row at a time instead of buffering a set of rows?（） — quick。 — skip-buffer。 — single-transaction。 — ta。
某施工单位承担一土石坝施工任务，该单位对坝基开挖做了施工组织设计，坝基基坑深为5.2m，采用药壶爆破法施工，土方量为9000m<sup>3</sup>，平均运距为10km，合同工期为8天。该施工单位有甲、乙、丙液压挖掘机各4台、2台、2台，A、B、C自卸汽车各12台、30台、18台，挖掘机的机械利用率为0.9，自卸汽车的机械利用率为0.95，其主要参数见表1、表2。
该工程施工组织设计中采用药壶爆破法开挖坝基石方是否合适？若合适，请说明理由。若不合适，指出合适的施工方法。
Which two statements about subqueries are true? （） A single row subquery can retrieve data from only one table.。 A SQL query statement cannot display data from table B that is referred to in its subquery, unless table B is included in the main query's FROM clause.。 A SQL query statement can display data from table B that is referred to in its subquery, without including table B in its own FROM clause.。 A single row subquery can retrieve data from more than one table.。 A single row subquery cannot be used in a condition where the LIKE operator is used for comparison.。 A multiple-row subquery cannot be used in a condition where the LIKE operator is used for comparison.。
三相异步电机铭牌中注有定额一项代表（）。
