使用砂轮切管机时，应（）接近工件。 ["A、快速 ","B、迅速 ","C、缓慢 ","D、较快"]
You want to set the following initialization parameters for your database instance： Identify the statement that correctly describes this setting.（） [" The MANDATORY location must be a flash recovery area."," The optional destinations may not use the flash recovery area."," This setting is not allowed because the first destination is not set as MANDATORY."," The online redo log file is not allowed to be overwritten if the archived log cannot be created in the fourth destination."]
液化石油气的密度比水轻是指（）。 ["气液平均；","气相；","液相；","气相混合"]
硅酸盐水泥的终凝时间不得长于（）。 ["6.5h","7.5h","8.5h","10h"]
Given that tables T1 and T2 contain the following rows: Table T1: C1 C2 1 4 1 3 1 2 Table T2: C1 C2 1 1 1 2 1 3 Which of the following queries will return only those rows that exist in both T1 and T2?（） ["SELECT * FROM t1 UNION SELECT * FROM t2","SELECT * FROM t1 UNION DISTINCT SELECT * FROM t2","SELECT * FROM t1 INTERSECT SELECT * FROM t2","SELECT * FROM t1 WHERE (c1,c2)= (SELECT c1,c2 FROM t2)"]
软信息在小企业贷款中的作用。
