【简答题】()是最能保证资金被合理利用的一种经济制度。
【简答题】以下哪项用于左连接( ) A.JOIN B.RIGHT JOIN C.LEFT JOIN D.INNER JOIN
【简答题】写出inner join、left join和right join的区别。
【单选题】—Where is my pen? —Oh, sorry, I have taken ______by mistakes
【单选题】脚手架立杆顶端栏杆宜高出檐口上端()m。
【单选题】脚手架立杆顶端栏杆宜高出檐口上端()m。
【单选题】— Where is my pen ? Have you seen ____? — Oh, sorry. I have taken ____ by mistake.
【单选题】- Where is my pen? - Oh, sorry. I have taken _ by mistake.