The database administrator of your company created a public synonym called HR for the HUMAN_RESOURCES table of the GENERAL schema, because many users frequently use this table. As a user of the database, you created a table called HR in your schema. What happens when you execute this query?（） [" You obtain the results retrieved from the public synonym HR created by the database administrator."," You obtain the results retrieved from the HR table that belongs to your schema."," You get an error message because you cannot retrieve from a table that has the same name as a public synonym."," You obtain the results retrieved from both the public synonym HR and the HR table that belongs to your schema, as a Cartesian product."," You obtain the results retrieved from both the public synonym HR and the HR table that belongs to your schema, as a FULL JOIN."]
作出人身安全保护令，应当具备下列条件（） ["有明确的被申请人","有具体的请求","有遭受家庭暴力或者面临家庭暴力现实危险的情形"]
The warning and critical threshold values have been set to 85% and 97%， respectively， for one of the tablespaces. The current tablespace space usage is 54%. You modify the warning threshold to be 50 % and critical threshold to be 53% in Database Control. Which statement is true？（） [" The new setting would be applied but no alerts would be raised immediately."," The new setting would be applied and an alert would be raised immediately."," The new setting would be ignored because the tablespace space usage is more than the specified threshold value."," The new setting would cause an error because the tablespace space usage is more than the specified threshold value."]
筒式封堵头采用（）的方式进行封堵。 ["机械膨胀","液压","气动","自然膨胀"]
两台变比相同的电流互感器，当一次线圈串联，二次线圈也串联使用时，测量总的变比为（）。 ["增加一倍","减小一倍","不变"]
摩擦学研究的对象很广泛，概括说研究摩擦、磨损（）和润滑（）的原理及其应用。
