第9题: [单项选择]在Visual FoxPro中,删除数据库表S的SQL命令是 A. DROP TABLES B. DELETE TABLE S C. DELETE TABLE S.DBF D. ERASE TABLE S 参考答案:A 答案解析:[解析] 题目中考查的SQL的删除表的命令,语法格式为: DROP TABLE表名故选项A为正确答案。
第26题: [单项选择]A pump is said to have "negative suction head" when the pump is located (). A. between the suction and discharge B. below the liquid supply C. above the liquid supply D. any of the above 参考答案:C