The CUSTOMERS table has these columns: CUSTOMER_ID NUMBER (4) NOT NULL CUSTOMER_NAME VARCHAR2 (100) NOT NULL STREET_ADDRESS VARCHAR2 (150) CITY_ADDRESS VARHCAR2 (50) STATE_ADDRESS VARCHAR2 (50) PROVINCE_ADDRESS VARCHAR2 (50) COUNTRY_ADDRESS VARCHAR2 (50) POSTAL_CODE VARCHAR2 (12) CUSTOMER_PHONE VARCHAR2 (20) The CUSTOMER_ID column is the primary key for the table. You need to determine how dispersed your customer base is. Which expression finds the number of different countries represented in the CUSTOMERS table?（） COUNT(UPPER(country_address))。 COUNT(DIFF(UPPER(country_address)))。 COUNT(UNIQUE(UPPER(country_address)))。 COUNT DISTINTC UPPER(country_address)。 COUNT(DISTINTC (UPPER(country_address)))。
染色体中的DNA双螺旋结构中，胞嘧啶碱基对面的碱基为（） 腺嘌呤。 胸腺嘧啶。 胞嘧啶。 鸟嘌呤。
Which of the following storage systems uses both 2.5-inch and 3.5-inch SAS disk drives?（） XIV system 。 DS3500 。 DS3400 。 DS5100。
安全日常活动白班每周不少于（）次，每次不少于1h。 4。 3。 2。 1。
小企业在制定远景规划时，其行业范围的确定应符合一元化经营的原则。
A customer is planning to purchase an IBM N series Gateway due to a requirement for file levelstorage. All available storage is managed by a SAN Volume Controller （SVC）. Where should the Nseries Gateway be placed in the network？（）
