第11题: [单项选择]The emulsion of the oil is mainly caused by (). A. the solid impurities of large particle B. the solid impurities of fine particle C. the water content D. both water and solid impurities 参考答案:C
第32题: [单项选择]设有学生表:STUD(学号,姓名,性别,年龄,专业),把学号为“20030019”的学生从该表中删除掉的语句是______。 A. DELETE STUD WHERE 学号=“20030019” B. DELETE FROM STUDWHERE学号=“20030019” C. DELETE TABLE STUD WHERE学号=“20030019” D. DELETE FROM WHERE 学号=“20030019” 参考答案:B 答案解析:[解析] 删除语句的一般格式为:DELETE FROM表名[WHERE<条件>]。该语句的功能是在指定的表中删除满足条件的那些记录。当没有使用WHERE子句时,则删除表中的全部记录。选项A、C、D的语