Given the following requirements:Create a table named TESTTAB, which has an identity column named ACTIVITYNO. Define the identity column to generate the values for the column by default. Start the values at 10 and increment by 10. Make the identity column unique. Which of the following CREATE statements will successfully create this table?（） ["CREATE TABLE TESTTAB (ACTIVITYNO SMALLINT NOT NULL GENERATED ALWAYS AS IDENTITY (START WITH 10 INCREMENT BY 10), ACTKWD CHAR(6) NOT NULL, ACTDESC VARCHAR(20) NOT NULL, UNIQUE(ACTIVITYNO))","CREATE TABLE TESTTAB (ACTIVITYNO SMALLINT NOT NULL GENERATED ALWAYS AS IDENTITY (START WITH 1 INCREMENT BY 10), ACTKWD CHAR(6) NOT NULL, ACTDESC VARCHAR(20) NOT NULL, UNIQUE(ACTNO))","CREATE TABLE TESTTAB (ACTIVITYNO SMALLINT NOT NULL GENERATED BY DEFAULT AS IDENTITY (START WITH 10 INCREMENT BY 1), ACTKWD CHAR(6) NOT NULL, ACTDESC VARCHAR(20) NOT NULL, UNIQUE(ACTIVITYNO))","CREATE TABLE TESTTAB (ACTIVITYNO SMALLINT NOT NULL GENERATED BY DEFAULT AS IDENTITY (START WITH 10 INCREMENT BY 10), ACTKWD CHAR(6) NOT NULL, ACTDESC VARCHAR(20) NOT NULL, UNIQUE(ACTIVITYNO))"]
施工企业定额，亦称施工定额，是进行企业经营和内部（）的依据。 ["安全管理","经济核算","质量管理","人事工作"]
DS5020磁盘阵列支持 SAS 和 SATA 磁盘的混插。
An administrator created a .env file in a user's home directory to configure a number of custom environment variables for a local application. However, after the user logs out and then logs back into the system, the custom variables are not being set. What is the most likely reason that the custom .env file is being ignored?（） ["A shell other than ksh is being used by the user.","The line 'export ENV=$HOME\/.env' is missing from \/etc\/profile.","The line 'export ENV=$HOME\/.env' is missing from the user's .profile.","The env_profile attribute is not defined for the user within \/etc\/security\/user."]
The storage specialist sized a DS8800 proposal with eight host adapters in the four-port version. 240 drives of the 146GB-15k rpm type will be installed. The proposal needs to meet a very competitive price. The customer will have only minor capacity growth in the future. Which of the following solutions best meets these requirements（） ["offer a DS8800 one-frame system in four-way processor version and standard cabling","offer a DS8800 one-frame system in two-way processor version and business class cabling","offer a DS8800 one-frame system in two-way processor version and standard cabling","offer a DS8800 one-frame system in four-way processor version and business class cabling"]
结合实例，分析一份完整的营销计划包括哪些内容。
