A technical specialist defined a virtual Ethernet ent2 on the VIO server that has a physical adapter， ent0. Which of the following commands should be used to configure the Shared Ethernet Adapter？（） mkvdev -sea ent2 -vadapter ent0 -default ent0 -defaultid 1。 mkdev -virtual ent0 -adapter ent3 -default en2 -defaultid 1。 mkvdev -sea ent0 -vadapter ent2 -default ent2 -defaultid 1。 mkvdev ent0 -sea -vadapter ent2 -default ent2 -defaultid 1。
简述基本草原保护制度的主要内容。
Sales details are being stored on a daily basis in the SALES_2007 table. A large amount of data is added to the table daily. To save disk space，you issued the following command： ALTER TABLE sales_2007 COMPRESS FOR ALL OPERATIONS； What would be the outcome of this command？（） It produces an error because data already exists in the table.。 It produces an error because compression can be enabled at table creation only.。 It compresses all data added or modified henceforth but the existing data in the table is not compressed immediately.。 It immediately compresses all existing data as well as new data， resulting from either fresh additions or modifications to existing data.。
直接计数法计数比客观实际的数值要（）。
特大洪水是指洪峰流量或洪量的重现期大于（）年一遇的洪水 20。 30。 40。 50。
下列不属于方向控制回路是（）。
