梦三国2第一视频网友说： sysdba是根用户,包含了所有权限,connect角色只是其中一小项;身份是固定在某个用户上的,比如sysdba身份的用户就是sys,新建的一个普通用户身份就是normal;而角色是可以灵活给某个用户赋予和剥夺的,根据需要而定.
Tom is late again. It is - --- - of him to keep others waiting. A normal B ordinary C l
VIP分享网 网友说： D,be typical of…是…的特征.固定搭配…
北京4000电影网网友说： still A 代替 B 还没有 C不管 D 继续,仍然
不是说英语被动语态是be+过去分词吗不是说英语被动语态是be后必须加过去分词吗?为什么be+过去分词过去分词前有一个别的词,还有疑问被动语态为什... - 作业帮
iiDVD影视网网友说：[答案] 英语被动语态是be后加过去分词,之间可以加副词.副词也可以放在过去分词后面 如 He was completely defeated by Tom./He was defeated completely by Tom. Her skills were greatly improved.///Her skills were improved greatly. 疑问被动语态是 be+主语...
