Examine the structure of the EMPLOYEES table:EMPLOYEE_ID NUM

【名词&注释】

郁达夫(daff)、朱自清、叶圣陶、许地山(xu di-shan)、《潘先生在难中》

[单选题]Examine the structure of the EMPLOYEES table:EMPLOYEE_ID NUMBER Primary KeyFIRST_NAME VARCHAR2(25)LAST_NAME VARCHAR2(25)HIRE_DATE DATEWhich UPDATE statement is valid?（）

A. UPDATE employees SET first_name = 'John' SET last_name ='Smith' WHERE employee_id = 180;
B. UPDATE employees SET first_name = 'John', SET last_name ='Smith' WHERE employee_id = 180;
C. UPDATE employees SET first_name = 'John' AND last_name ='Smith' WHERE employee_id = 180;
D. UPDATE employees SET first_name = 'John', last_name ='Smith' WHERE employee_id = 180

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学习资料：

[单选题]小说《潘先生在难中》的作者是（）

A. 叶圣陶
B. 许地山
C. 郁达夫
D. 朱自清

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